CVE-2025-70099
📛 CVE Title
CVE-2025-70099
Description
A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mitre
- CVSS severity
- high
- CVSS score
- 7.5 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Effective score
- 7.5 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- 2026-01-09
- Published
- 2026-06-01 00:00 UTC
- Last updated
- 2026-06-02 15:20 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/70xxx/CVE-2025-70099.json
- Linked Threat
- CVE-2025-70099 — CVE-2025-70099
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
- 2026-06-01 21:16:24 UTC
- NVD last modified
- 2026-07-22 08:10:00 UTC
- NVD CVSS v3.1
- 7.5 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 3.6 / 10
- EPSS score
- 0.0038 (probability of exploitation in next 30 days)
- EPSS percentile
- 31.04% vs all CVEs — higher = more likely to be exploited, as of 2026-07-27
NVD-assigned CWE(s):
CWE-476
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-07-27 20:10 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-2025-210028 - Assigner
- mitre
- Published
- Jun 1, 2026, 12:00:00 AM
- Updated
- Jun 29, 2026, 7:34:43 PM
- EUVD base score (CVSS 3.1)
-
7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EUVD-reported EPSS
- 0.3800
- Vendors
- n/a
- Products
-
n/a (n/a)
- Aliases
-
GHSA-vgqp-ggfv-3xf6
ENISA description: A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| n/a | n/a |
n/a (affected)
|
— |
Vendor references (3)
References embedded in the original CVE record by the assigning CNA.
Web references (6)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://github.com/gkostka/lwext4/issues/89 tenable:github.com
- https://github.com/sigdevel/pocs/blob/main/res/lwext4/1/sig11_2_1_lwext4_ext4_dir_h_126 tenable:github.com
- https://infosec.exchange/@sigdevel/116668939725424227 tenable:infosec.exchange
- https://nvd.nist.gov/vuln/detail/CVE-2025-70099 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2025-70099 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
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.
- http://www.openwall.com/lists/oss-security/2026/06/29/4 af854a3a-2127-422b-91ae-364da2661108
- https://github.com/gkostka/lwext4/issues/89 cve@mitre.org
- https://github.com/gkostka/lwext4/issues/89 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://github.com/sigdevel/pocs/blob/main/res/lwext4/1/sig11_2_1_lwext4_ext4_dir_h_126 cve@mitre.org
- https://infosec.exchange/@sigdevel/116668939725424227 cve@mitre.org
Remediations (20)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:arcraiders.com
ARC Raiders is a multiplayer extraction adventure, set in a lethal future earth, ravaged by a mysterious mechanized threat known as ARC.
2026-06-08 15:47 UTC -
web:blog.qualys.com
RedSun is a zero-day LPE in Microsoft Defender with no patch available. Learn how to detect and mitigate it instantly using Qualys VMDR and TruRisk™ Eliminate.
2026-06-08 15:47 UTC -
web:epatch.pa.gov
Why does PATCH exist? Its purpose is to better enable the public to obtain criminal history record checks. The repository was created and is maintained in accordance with Pennsylvania's Criminal History Information Act contained in Chapter 91 of Title 18, Crimes Code. This Act also directs the Pennsylvania State Police (PSP) to disseminate criminal history data to criminal justice agencies ...
2026-06-08 15:47 UTC -
web:github.com
A new and improved community patch for BO3. . Contribute to shiversoftdev/t7patch development by creating an account on GitHub.
2026-06-08 15:47 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-06-08 15:47 UTC -
web:vulners.com
A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During...
2026-06-08 15:47 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's October 2025 Patch Tuesday, which includes security updates for 172 flaws, including six zero-day vulnerabilities. Get patching!
2026-06-08 15:47 UTC -
web:www.cisa.gov
Reboot servers after installation to complete mitigation . In addition to checking for endpoint security platform events, CISA recommends that potentially affected organizations investigate signs of threat activity on their networks:
2026-06-08 15:47 UTC -
web:www.dbtsupport.com
Executive Summary The May 2026 Microsoft Patch Tuesday release includes security updates across supported Microsoft products and should be reviewed directly in the Microsoft Security Update Guide for the final CVE list, affected products, severity ratings, exploitability assessments, and any revised guidance. For enterprise IT teams, this month is especially important because the June 2026 ...
2026-06-08 15:47 UTC -
web:www.thehackerwire.com
CVE-2025-70099 is a Info severity vulnerability (CVSS 0). A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of...
2026-06-08 15:47 UTC -
web:krebsonsecurity.com
Microsoft Corp. today issued security updates to fix more than 80 vulnerabilities in its Windows operating systems and software. There are no known "zero-day" or actively exploited ...
2026-06-19 02:32 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 02:32 UTC -
web:support.microsoft.com
Improvements This update includes new features and quality improvements that were part of the following update: May 12, 2026—KB5089548 (OS Build 28000.2113) May 26, 2026—KB5089570 (OS Build 28000.2179) This update addresses security vulnerabilities documented in the following guide: June 2026 Security Updates The following summary outlines key quality improvements addressed by this update ...
2026-06-19 02:32 UTC -
web:tech.yahoo.com
Microsoft has now confirmed two new Microsoft Defender zero-days that it said had been exploited. This exploitation was confirmed by CISA, which has added the security flaws to its Known Exploited Vulnerabilities catalog and given federal agencies until June 3 to ensure mitigation measures are in place.
2026-06-19 02:32 UTC -
web:windowsforum.com
Microsoft's September Patch Tuesday delivered a broad, operationally important set of security updates on September 9, 2025 , covering Windows, Microsoft Office, SQL Server and related platform components — with industry trackers reporting roughly 80-86 CVEs patched and several high‑priority issues that merit immediate triage.
2026-06-19 02:32 UTC -
web:www.crowdstrike.com
Microsoft has released security updates for 84 vulnerabilities, including 2 publicly disclosed zero-day and 8 critical, in its September 2025 Patch Tuesday rollout.
2026-06-19 02:32 UTC -
web:www.esri.com
Key highlights The ArcGIS Server Security 2025 update 2 is available This patch resolves 10 Medium severity vulnerabilities This security patch is cumulative, and includes fixes provided in the ArcGIS Server Security 2025 update 1.
2026-06-19 02:32 UTC -
web:www.oracle.com
This Critical Patch Update contains 318 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 January 2025 Critical Patch Update: Executive Summary and Analysis.
2026-06-19 02:32 UTC -
web:www.oracle.com
This Critical Patch Update contains 374 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 October 2025 Critical Patch Update: Executive Summary and Analysis.
2026-06-19 02:32 UTC -
web:www.tenable.com
Key takeaways: Microsoft's 2025 Patch Tuesday releases addressed 1,130 CVEs . This is the second year in a row where the CVE count was over 1,000. Elevation of Privilege vulnerabilities accounted for 38.3% of all Patch Tuesday vulnerabilities in 2025 , followed by Remote Code Execution flaws at 30.8%. 41 zero-day vulnerabilities were addressed across all Patch Tuesday releases in 2025 , including ...
2026-06-19 02:32 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2025-70099.json.
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"confidentialityImpact": "NONE",
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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