CVE-2022-49343
ext4: avoid cycles in directory h-tree
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid cycles in directory h-tree A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < 24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < e157c8f87e8fac112d6c955e69a60cdb9bc80a60
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < ff4cafa51762da3824881a9000ca421d4b78b138
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < 3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < d5a16a6df2c16eaf4de04948553ef0089dee463f
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < 6084240bfc44bf265ab6ae7d96980469b05be0f1
- affected ac27a0ec112a089f1a5102bc8dffc79c8c815571 – < 3ba733f879c2a88910744647e41edeefbc0d92b2
- affected 2.6.19
- unaffected < 2.6.19
- unaffected 4.14.283 – ≤ 4.14.*
- unaffected 4.19.247 – ≤ 4.19.*
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.121 – ≤ 5.10.*
- unaffected 5.15.46 – ≤ 5.15.*
- unaffected 5.17.14 – ≤ 5.17.*
- unaffected 5.18.3 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (8)
- https://git.kernel.org/stable/c/24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3 (opens in a new tab)
- https://git.kernel.org/stable/c/b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0 (opens in a new tab)
- https://git.kernel.org/stable/c/e157c8f87e8fac112d6c955e69a60cdb9bc80a60 (opens in a new tab)
- https://git.kernel.org/stable/c/ff4cafa51762da3824881a9000ca421d4b78b138 (opens in a new tab)
- https://git.kernel.org/stable/c/3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc (opens in a new tab)
- https://git.kernel.org/stable/c/d5a16a6df2c16eaf4de04948553ef0089dee463f (opens in a new tab)
- https://git.kernel.org/stable/c/6084240bfc44bf265ab6ae7d96980469b05be0f1 (opens in a new tab)
- https://git.kernel.org/stable/c/3ba733f879c2a88910744647e41edeefbc0d92b2 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-49343)Record last updated .