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CVE-2026-46094

📛 CVE Title

ext4: fix bounds check in check_xattrs() to prevent out-of-bounds access

⬇ Download JSON ⚠ View as Threat

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix bounds check in check_xattrs() to prevent out-of-bounds access The bounds check for the next xattr entry in check_xattrs() uses (void *)next >= end, which allows next to point within sizeof(u32) bytes of end. On the next loop iteration, IS_LAST_ENTRY() reads 4 bytes via *(__u32 *)(entry), which can overrun the valid xattr region. For example, if next lands at end - 1, the check passes since next < end, but IS_LAST_ENTRY() reads 4 bytes starting at end - 1, accessing 3 bytes beyond the valid region. Fix this by changing the check to (void *)next + sizeof(u32) > end, ensuring there is always enough space for the IS_LAST_ENTRY() read on the subsequent iteration.

Overview

State
PUBLISHED
Assigner (CNA)
Linux
CVSS severity
high
CVSS score
CVSS 7.1 / 10 7.1 7.1 / 10
CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Effective score
7.1 / 10 HIGH source: CNA overview
MSRC score
7.1 / 10 HIGH MS rating: Moderate
CWE(s)
—
Reserved
2026-05-13
Published
2026-05-27 12:58 UTC
Last updated
2026-05-27 12:58 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/46xxx/CVE-2026-46094.json
Linked Threat
CVE-2026-46094 — CVE-2026-46094

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 14:17:30 UTC
NVD last modified
2026-06-25 21:16:11 UTC
NVD CVSS v3.1
CVSS 7.1 / 10 7.1 7.1 / 10 HIGH source: nvd@nist.gov
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Exploitability subscore
1.8 / 10
Impact subscore
5.2 / 10
EPSS score
0.0013 (probability of exploitation in next 30 days)
EPSS percentile
2.61% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01

NVD-assigned CWE(s): CWE-125 (differs from the CNA list above)

NVD / KEV / EPSS data refreshed 2026-08-01 17:10 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-2026-32477
Assigner
Linux
Published
May 27, 2026, 12:58:45 PM
Updated
Jun 14, 2026, 5:53:57 PM
EUVD base score
0.0 / 10
EUVD-reported EPSS
0.1300
Vendors
Linux
Products
Linux (patch: 6.12.86)
Linux (patch: 7.1)
Linux (3478c83cf26bbffd026ae6a56bcb1fe544f0834e <520986722dbf869c122252123fc161c7302eab7d)
Linux (3478c83cf26bbffd026ae6a56bcb1fe544f0834e <5a5314d2387633a272a04d1bd8727f99058e4e68)
Linux (patch: 6.18.27)
Linux (patch: 7.0.4)
Linux (patch: 6.6.140)
Linux (3478c83cf26bbffd026ae6a56bcb1fe544f0834e <ab6da97bc310db35d4e4ef5354bc3ff626b0698c)
Linux (6.3)
Linux (patch: 0)
Linux (3478c83cf26bbffd026ae6a56bcb1fe544f0834e <537e065977022aa22f2c2503e8accaf16622e0fd)
Linux (3478c83cf26bbffd026ae6a56bcb1fe544f0834e <eceafc31ea7b42c984ece10d79d505c0bb6615d5)
Aliases
GHSA-vjw4-hv65-7vhq

ENISA description: In the Linux kernel, the following vulnerability has been resolved: ext4: fix bounds check in check_xattrs() to prevent out-of-bounds access The bounds check for the next xattr entry in check_xattrs() uses (void *)next >= end, which allows next to point within sizeof(u32) bytes of end. On the next loop iteration, IS_LAST_ENTRY() reads 4 bytes via *(__u32 *)(entry), which can overrun the valid xattr region. For example, if next lands at end - 1, the check passes since next < end, but IS_LAST_ENTRY() reads 4 bytes starting at end - 1, accessing 3 bytes beyond the valid region. Fix this by changing the check to (void *)next + sizeof(u32) > end, ensuring there is always enough space for the IS_LAST_ENTRY() read on the subsequent iteration.

EUVD references (5)

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
Moderate
MS CVSS base score
7.1 / 10 (temporal 6.5)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U
Release
2026-May
Microsoft remediations / KB articles (2)

Affected products (2)
VendorProductVersionsPlatforms
Linux Linux 3478c83cf26bbffd026ae6a56bcb1fe544f0834e (affected), 3478c83cf26bbffd026ae6a56bcb1fe544f0834e (affected), 3478c83cf26bbffd026ae6a56bcb1fe544f0834e (affected), 3478c83cf26bbffd026ae6a56bcb1fe544f0834e (affected), 3478c83cf26bbffd026ae6a56bcb1fe544f0834e (affected) —
Linux Linux 6.3 (affected), 0 (unaffected), 6.6.140 (unaffected), 6.12.86 (unaffected), 6.18.27 (unaffected), 7.0.4 (unaffected), 7.1-rc1 (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 (5)

References embedded in the original CVE record by the assigning CNA.

Web references (10)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (18)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Microsoft Patch Tuesday May 2026 - 120 Vulnerabilities Fixed, Including ...
    web:cybersecuritynews.com

    Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.

    2026-06-04 00:11 UTC
  • Microsoft's May 2026 Patch Tuesday - Hive Pro
    web:hivepro.com

    Microsoft's May 2026 Patch Tuesday security update addresses 137 critical vulnerabilities across the Microsoft product ecosystem, representing a significant security update for enterprise and consumer environments.

    2026-06-04 00:11 UTC
  • Microsoft Defender Vulnerabilities Added to CISA KEV (CVE-2026-41091 ...
    web:op-c.net

    CISA added two actively exploited Microsoft Defender vulnerabilities, CVE - 2026 -41091 and CVE - 2026 -45498, to its KEV catalog. Learn the risks and recommended actions.

    2026-06-04 00:11 UTC
  • Security Update Guide - Microsoft
    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.

    2026-06-04 00:11 UTC
  • Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...
    web:support.servicenow.com

    Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

    2026-06-04 00:11 UTC
  • CVE-2026-46094 ext4 xattr Bug: One-Line Fix, Big Patch Work for Windows ...
    web:windowsforum.com

    CVE-2026-46094 is a newly published Linux kernel ext4 vulnerability, disclosed by NVD on May 27, 2026 , in which a faulty extended-attribute bounds check could allow a four-byte read past the valid xattr region during filesystem metadata validation. The fix is almost comically small: one changed...

    2026-06-04 00:11 UTC
  • April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

    2026-06-04 00:11 UTC
  • Microsoft Patch Tuesday - May 2026 - Lansweeper
    web:www.lansweeper.com

    Which vulnerabilities, issues, and other things did Microsoft update? Discover what's new using Lansweeper's Patch Tuesday May 2026 summary.

    2026-06-04 00:11 UTC
  • Microsoft Defender vulnerabilities are being exploited in the wild
    web:www.malwarebytes.com

    The KEV catalog tracks vulnerabilities known to be exploited in the wild and sets patch deadlines for Federal Civilian Executive Branch (FCEB) agencies. Five of the added vulnerabilities are quite old by vulnerability standards. Patches were released in 2008, 2009, and 2010. But the Microsoft Defender vulnerabilities are from this year. Those ...

    2026-06-04 00:11 UTC
  • Oracle Critical Patch Update Advisory - April 2026
    web:www.oracle.com

    Customers are strongly advised to apply the April 2026 Critical Patch Update for Fusion Middleware products, which includes patches for this Alert as well as additional patches. Affected Products and Patch Information Security vulnerabilities addressed by this Critical Patch Update affect the products listed below.

    2026-06-04 00:11 UTC
  • Microsoft Confirms Defender RoguePlanet 0-Day Exploit and Working to ...
    web:cybersecuritynews.com

    Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.

    2026-06-19 02:28 UTC
  • SAP Security Patch Day - February 2026
    web:support.sap.com

    SAP security Patch Day Bulletin

    2026-06-19 02:28 UTC
  • Critical Patches Issued for Microsoft Products, April 14, 2026
    web:www.cisecurity.org

    <p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

    2026-06-19 02:28 UTC
  • May 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.

    2026-06-19 02:28 UTC
  • Microsoft working on a fix for RoguePlanet, a flaw that grants full PC ...
    web:www.malwarebytes.com

    Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.

    2026-06-19 02:28 UTC
  • Microsoft Technical Security Notifications
    web:www.microsoft.com

    Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.

    2026-06-19 02:28 UTC
  • Oracle Critical Security Patch Update Advisory - May 2026
    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 02:28 UTC
  • Patch Tuesday June 2026: Security Updates & CVE Analysis
    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 02:28 UTC

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-46094.json.

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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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            {
              "lessThanOrEqual": "7.0.*",
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              "version": "7.0.4",
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            },
            {
              "lessThanOrEqual": "*",
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              "versionType": "original_commit_for_fix"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bounds check in check_xattrs() to prevent out-of-bounds access\n\nThe bounds check for the next xattr entry in check_xattrs() uses\n(void *)next >= end, which allows next to point within sizeof(u32)\nbytes of end. On the next loop iteration, IS_LAST_ENTRY() reads 4\nbytes via *(__u32 *)(entry), which can overrun the valid xattr region.\n\nFor example, if next lands at end - 1, the check passes since\nnext < end, but IS_LAST_ENTRY() reads 4 bytes starting at end - 1,\naccessing 3 bytes beyond the valid region.\n\nFix this by changing the check to (void *)next + sizeof(u32) > end,\nensuring there is always enough space for the IS_LAST_ENTRY() read\non the subsequent iteration."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:58:45.304Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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      ],
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    "cveId": "CVE-2026-46094",
    "datePublished": "2026-05-27T12:58:45.304Z",
    "dateReserved": "2026-05-13T15:03:33.097Z",
    "dateUpdated": "2026-05-27T12:58:45.304Z",
    "state": "PUBLISHED"
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}