CVE-2026-45912
📛 CVE Title
ext4: don't cache extent during splitting extent
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: don't cache extent during splitting extent Caching extents during the splitting process is risky, as it may result in stale extents remaining in the status tree. Moreover, in most cases, the corresponding extent block entries are likely already cached before the split happens, making caching here not particularly useful. Assume we have an unwritten extent, and then DIO writes the first half. [UUUUUUUUUUUUUUUU] on-disk extent U: unwritten extent [UUUUUUUUUUUUUUUU] extent status tree |<- ->| ----> dio write this range First, when ext4_split_extent_at() splits this extent, it truncates the existing extent and then inserts a new one. During this process, this extent status entry may be shrunk, and calls to ext4_find_extent() and ext4_cache_extents() may occur, which could potentially insert the truncated range as a hole into the extent status tree. After the split is completed, this hole is not replaced with the correct status. [UUUUUUU|UUUUUUUU] on-disk extent U: unwritten extent [UUUUUUU|HHHHHHHH] extent status tree H: hole Then, the outer calling functions will not correct this remaining hole extent either. Finally, if we perform a delayed buffer write on this latter part, it will re-insert the delayed extent and cause an error in space accounting. In adition, if the unwritten extent cache is not shrunk during the splitting, ext4_cache_extents() also conflicts with existing extents when caching extents. In the future, we will add checks when caching extents, which will trigger a warning. Therefore, Do not cache extents that are being split.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- Linux
- CVSS severity
- high
- CVSS score
- 7.1 / 10
- CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H- Effective score
- 7.1 / 10 HIGH source: CNA overview
- MSRC score
- 7.1 / 10 HIGH MS rating: Important
- CWE(s)
- —
- Reserved
- 2026-05-13
- Published
- 2026-05-27 12:17 UTC
- Last updated
- 2026-05-30 10:41 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45912.json
- Linked Threat
- CVE-2026-45912 — CVE-2026-45912
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-27 14:17:05 UTC
- NVD last modified
- 2026-06-24 14:55:11 UTC
- NVD CVSS v3.1
- 5.5 / 10 MEDIUM source: nvd@nist.gov
- NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- Exploitability subscore
- 1.8 / 10
- Impact subscore
- 3.6 / 10
- EPSS score
- 0.0012 (probability of exploitation in next 30 days)
- EPSS percentile
- 2.40% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01
NVD / KEV / EPSS data refreshed 2026-08-01 17:13 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-32378 - Assigner
- Linux
- Published
- May 27, 2026, 12:17:27 PM
- Updated
- May 30, 2026, 10:41:46 AM
- EUVD base score
- 0.0 / 10
- EUVD-reported EPSS
- 0.1200
- Vendors
- Linux
- Products
-
Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <9a2b95cdaf07785e2739199037bd9c0863ccc1be)Linux (patch: 6.19.4)Linux (patch: 5.10.252)Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <8302b5b4aacdbb378f7b1216bb2ee782b5142415)Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <692103feca376ae4298c92aa8828015d20f1d87b)Linux (patch: 5.15.202)Linux (patch: 6.1.165)Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <96007fd3c106aea773c1afae2d6f64cceb6da208)Linux (3.12)Linux (patch: 6.18.14)Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <4c2d9dac4d328244f9365b0a1fa27ec802821820)Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <93b2ebbbcb2e63cfc21a1946dfe91d3aa7952036)Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <8b4b19a2f96348d70bfa306ef7d4a13b0bcbea79)Linux (patch: 0)Linux (107a7bd31ac003e42c0f966aa8e5b26947de6024 <5b1f4290453314e11cd8e15c7baa8a9b76c19b23)Linux (patch: 6.6.128)Linux (patch: 6.12.75)Linux (patch: 7.0)
- Aliases
-
GHSA-2r5x-f6hq-8f5p
ENISA description: In the Linux kernel, the following vulnerability has been resolved: ext4: don't cache extent during splitting extent Caching extents during the splitting process is risky, as it may result in stale extents remaining in the status tree. Moreover, in most cases, the corresponding extent block entries are likely already cached before the split happens, making caching here not particularly useful. Assume we have an unwritten extent, and then DIO writes the first half. [UUUUUUUUUUUUUUUU] on-disk extent U: unwritten extent [UUUUUUUUUUUUUUUU] extent status tree |<- ->| ----> dio write this range First, when ext4_split_extent_at() splits this extent, it truncates the existing extent and then inserts a new one. During this process, this extent status entry may be shrunk, and calls to ext4_find_extent() and ext4_cache_extents() may occur, which could potentially insert the truncated range as a hole into the extent status tree. After the split is completed, this hole is not replaced with the correct status. [UUUUUUU|UUUUUUUU] on-disk extent U: unwritten extent [UUUUUUU|HHHHHHHH] extent status tree H: hole Then, the outer calling functions will not correct this remaining hole extent either. Finally, if we perform a delayed buffer write on this latter part, it will re-insert the delayed extent and cause an error in space accounting. In adition, if the unwritten extent cache is not shrunk during the splitting, ext4_cache_extents() also conflicts with existing extents when caching extents. In the future, we will add checks when caching extents, which will trigger a warning. Therefore, Do not cache extents that are being split.
EUVD references (8)
- https://git.kernel.org/stable/c/8302b5b4aacdbb378f7b1216bb2ee782b5142415
- https://git.kernel.org/stable/c/692103feca376ae4298c92aa8828015d20f1d87b
- https://git.kernel.org/stable/c/4c2d9dac4d328244f9365b0a1fa27ec802821820
- https://git.kernel.org/stable/c/93b2ebbbcb2e63cfc21a1946dfe91d3aa7952036
- https://git.kernel.org/stable/c/96007fd3c106aea773c1afae2d6f64cceb6da208
- https://git.kernel.org/stable/c/5b1f4290453314e11cd8e15c7baa8a9b76c19b23
- https://git.kernel.org/stable/c/9a2b95cdaf07785e2739199037bd9c0863ccc1be
- https://git.kernel.org/stable/c/8b4b19a2f96348d70bfa306ef7d4a13b0bcbea79
Microsoft Security Response Center MSRC
Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-12 01:09 UTC (source: CVRF).
- MS severity
- Important
- MS CVSS base score
- 7.1 / 10 (temporal 7.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H - Release
- 2026-May
Affected products (2)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Linux | Linux |
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected),
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected),
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected),
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected),
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected),
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected),
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected),
107a7bd31ac003e42c0f966aa8e5b26947de6024 (affected)
|
— |
| Linux | Linux |
3.12 (affected),
0 (unaffected),
5.10.252 (unaffected),
5.15.202 (unaffected),
6.1.165 (unaffected),
6.6.128 (unaffected),
6.12.75 (unaffected),
6.18.14 (unaffected),
6.19.4 (unaffected),
7.0 (unaffected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendor references (8)
References embedded in the original CVE record by the assigning CNA.
- https://git.kernel.org/stable/c/8302b5b4aacdbb378f7b1216bb2ee782b5142415
- https://git.kernel.org/stable/c/692103feca376ae4298c92aa8828015d20f1d87b
- https://git.kernel.org/stable/c/4c2d9dac4d328244f9365b0a1fa27ec802821820
- https://git.kernel.org/stable/c/93b2ebbbcb2e63cfc21a1946dfe91d3aa7952036
- https://git.kernel.org/stable/c/96007fd3c106aea773c1afae2d6f64cceb6da208
- https://git.kernel.org/stable/c/5b1f4290453314e11cd8e15c7baa8a9b76c19b23
- https://git.kernel.org/stable/c/9a2b95cdaf07785e2739199037bd9c0863ccc1be
- https://git.kernel.org/stable/c/8b4b19a2f96348d70bfa306ef7d4a13b0bcbea79
Web references (12)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- MSRC update guide: CVE-2026-45912 msrc
- https://git.kernel.org/stable/c/5b1f4290453314e11cd8e15c7baa8a9b76c19b23 tenable:git.kernel.org
- https://git.kernel.org/stable/c/692103feca376ae4298c92aa8828015d20f1d87b tenable:git.kernel.org
- https://git.kernel.org/stable/c/8302b5b4aacdbb378f7b1216bb2ee782b5142415 tenable:git.kernel.org
- https://git.kernel.org/stable/c/8b4b19a2f96348d70bfa306ef7d4a13b0bcbea79 tenable:git.kernel.org
- https://git.kernel.org/stable/c/93b2ebbbcb2e63cfc21a1946dfe91d3aa7952036 tenable:git.kernel.org
- https://git.kernel.org/stable/c/96007fd3c106aea773c1afae2d6f64cceb6da208 tenable:git.kernel.org
- https://git.kernel.org/stable/c/9a2b95cdaf07785e2739199037bd9c0863ccc1be tenable:git.kernel.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-45912 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-45912 tenable:www.cve.org
- https://git.kernel.org/stable/c/4c2d9dac4d328244f9365b0a1fa27ec802821820 tenable:git.kernel.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (8)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://git.kernel.org/stable/c/4c2d9dac4d328244f9365b0a1fa27ec802821820 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/5b1f4290453314e11cd8e15c7baa8a9b76c19b23 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/692103feca376ae4298c92aa8828015d20f1d87b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/8302b5b4aacdbb378f7b1216bb2ee782b5142415 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/8b4b19a2f96348d70bfa306ef7d4a13b0bcbea79 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/93b2ebbbcb2e63cfc21a1946dfe91d3aa7952036 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/96007fd3c106aea773c1afae2d6f64cceb6da208 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/9a2b95cdaf07785e2739199037bd9c0863ccc1be 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
Remediations (20)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:access.redhat.com
The mitigation methods below address both vulnerabilities that affect Red Hat products — CVE - 2026 -43284 (IPsec ESP) and CVE - 2026 -46300 (XFRM ESP-in-TCP). CVE - 2026 -43500 (rxrpc) does not affect Red Hat products and requires no mitigation .
2026-06-04 00:15 UTC -
web:officialfixdessertchocolatier.com
Indulge in Dubai's viral chocolate bars with FIX Dessert Chocolatier. Shop our hero collection featuring Baklawa, Knafeh, Biscoff, and more. Fast delivery in Dubai & Abu Dhabi. Order now!
2026-06-04 00:15 UTC -
web:patch.com
The best breaking news, stories, and events from the Patch network of local news sites
2026-06-04 00:15 UTC -
web:playvalorant.com
VALORANT Patch Notes 11.11 Minor UI updates, Bug Fixes, VP gifting, and a festive surprise coming soon.
2026-06-04 00:15 UTC -
web:techcommunity.microsoft.com
Exchange Online is not impacted by this vulnerability. Mitigations Option 1 (recommended): Exchange Emergency Mitigation (EM) Service For customers who have the Exchange EM Service enabled, Microsoft released the automatic mitigation for Exchange Server 2016, 2019 and SE. The mitigation is already published and is enabled automatically.
2026-06-04 00:15 UTC -
web:www.cve.org
At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures
2026-06-04 00:15 UTC -
web:www.oracle.com
Oracle Critical Patch Update Advisory - January 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical ...
2026-06-04 00:15 UTC -
web:www.patch.moe
Age Verification Are you 18 years or older? YES NO
2026-06-04 00:15 UTC -
web:www.romhacking.net
Add temporary header() Patch file: Apply patch Original ROM: Modified ROM: Patch type: IPS BPS PPF UPS APS RUP Create patch Settings Rom Patcher JS v2.9 by Marc Robledo See on GitHub Donate Language English Français Deutsch Italiano Español Nederlands Svenska Català Valencià Português Brasileiro Russian 日本語 中文(简体) 中文 ...
2026-06-04 00:15 UTC -
web:www.screwfix.com
Screwfix offers a wide range of trade tools and hardware at competitive prices with convenient delivery and collection options.
2026-06-04 00:15 UTC -
web:learn.microsoft.com
Windows 11, version 25H2 is now available for all eligible devices. Devices running Home and Pro editions of Windows 11 that are not managed by IT departments will receive the update to Windows 11, version 25H2 through the machine learning-based intelligent rollout.
2026-06-19 02:27 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-06-19 02:27 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-06-19 02:27 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-06-19 02:27 UTC -
web:www.oracle.com
This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.
2026-06-19 02:27 UTC -
web:www.pdq.com
May 2026 Patch Tuesday is here, and PDQ is back with another recap. Will we see another month of increased CVE volume? Is AI to blame? Dive in to learn more.
2026-06-19 02:27 UTC -
web:www.rapid7.com
Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.
2026-06-19 02:27 UTC -
web:www.tenable.com
Oracle addresses 241 CVEs in its April Critical Patch Update, the second quarterly update of 2026 with 481 patches, including 34 critical updates.
2026-06-19 02:27 UTC -
web:www.vulncheck.com
VulnCheck identified 25 CVEs disclosed in 2026 that have been routinely targeted by adversaries and researchers so far this year, drawing from a global body of exploit code and exploitation data.
2026-06-19 02:27 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-06-19 02:27 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-45912.json.
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/ext4/extents.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "8302b5b4aacdbb378f7b1216bb2ee782b5142415",
"status": "affected",
"version": "107a7bd31ac003e42c0f966aa8e5b26947de6024",
"versionType": "git"
},
{
"lessThan": "692103feca376ae4298c92aa8828015d20f1d87b",
"status": "affected",
"version": "107a7bd31ac003e42c0f966aa8e5b26947de6024",
"versionType": "git"
},
{
"lessThan": "4c2d9dac4d328244f9365b0a1fa27ec802821820",
"status": "affected",
"version": "107a7bd31ac003e42c0f966aa8e5b26947de6024",
"versionType": "git"
},
{
"lessThan": "93b2ebbbcb2e63cfc21a1946dfe91d3aa7952036",
"status": "affected",
"version": "107a7bd31ac003e42c0f966aa8e5b26947de6024",
"versionType": "git"
},
{
"lessThan": "96007fd3c106aea773c1afae2d6f64cceb6da208",
"status": "affected",
"version": "107a7bd31ac003e42c0f966aa8e5b26947de6024",
"versionType": "git"
},
{
"lessThan": "5b1f4290453314e11cd8e15c7baa8a9b76c19b23",
"status": "affected",
"version": "107a7bd31ac003e42c0f966aa8e5b26947de6024",
"versionType": "git"
},
{
"lessThan": "9a2b95cdaf07785e2739199037bd9c0863ccc1be",
"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/ext4/extents.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.12"
},
{
"lessThan": "3.12",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.252",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.202",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.165",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.128",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.75",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.252",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.202",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.165",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.128",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.75",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.14",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.4",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0",
"versionStartIncluding": "3.12",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: don't cache extent during splitting extent\n\nCaching extents during the splitting process is risky, as it may result\nin stale extents remaining in the status tree. Moreover, in most cases,\nthe corresponding extent block entries are likely already cached before\nthe split happens, making caching here not particularly useful.\n\nAssume we have an unwritten extent, and then DIO writes the first half.\n\n [UUUUUUUUUUUUUUUU] on-disk extent U: unwritten extent\n [UUUUUUUUUUUUUUUU] extent status tree\n |<- ->| ----> dio write this range\n\nFirst, when ext4_split_extent_at() splits this extent, it truncates the\nexisting extent and then inserts a new one. During this process, this\nextent status entry may be shrunk, and calls to ext4_find_extent() and\next4_cache_extents() may occur, which could potentially insert the\ntruncated range as a hole into the extent status tree. After the split\nis completed, this hole is not replaced with the correct status.\n\n [UUUUUUU|UUUUUUUU] on-disk extent U: unwritten extent\n [UUUUUUU|HHHHHHHH] extent status tree H: hole\n\nThen, the outer calling functions will not correct this remaining hole\nextent either. Finally, if we perform a delayed buffer write on this\nlatter part, it will re-insert the delayed extent and cause an error in\nspace accounting.\n\nIn adition, if the unwritten extent cache is not shrunk during the\nsplitting, ext4_cache_extents() also conflicts with existing extents\nwhen caching extents. In the future, we will add checks when caching\nextents, which will trigger a warning. Therefore, Do not cache extents\nthat are being split."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-30T10:41:46.666Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/8302b5b4aacdbb378f7b1216bb2ee782b5142415"
},
{
"url": "https://git.kernel.org/stable/c/692103feca376ae4298c92aa8828015d20f1d87b"
},
{
"url": "https://git.kernel.org/stable/c/4c2d9dac4d328244f9365b0a1fa27ec802821820"
},
{
"url": "https://git.kernel.org/stable/c/93b2ebbbcb2e63cfc21a1946dfe91d3aa7952036"
},
{
"url": "https://git.kernel.org/stable/c/96007fd3c106aea773c1afae2d6f64cceb6da208"
},
{
"url": "https://git.kernel.org/stable/c/5b1f4290453314e11cd8e15c7baa8a9b76c19b23"
},
{
"url": "https://git.kernel.org/stable/c/9a2b95cdaf07785e2739199037bd9c0863ccc1be"
},
{
"url": "https://git.kernel.org/stable/c/8b4b19a2f96348d70bfa306ef7d4a13b0bcbea79"
}
],
"title": "ext4: don't cache extent during splitting extent",
"x_generator": {
"engine": "bippy-1.2.0"
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}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-45912",
"datePublished": "2026-05-27T12:17:27.805Z",
"dateReserved": "2026-05-13T15:03:33.085Z",
"dateUpdated": "2026-05-30T10:41:46.666Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}