CVE-2024-46744Squashfs: sanity check symbolic link size
- 7.8HighCVSS base score
- 0.30%Exploitation in 30 daysEPSS · top 77% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: Squashfs: sanity check symbolic link size Syzkiller reports a "KMSAN: uninit-value in pick_link" bug. This is caused by an uninitialised page, which is ultimately caused by a corrupted symbolic link size read from disk. The reason why the corrupted symlink size causes an uninitialised page is due to the following sequence of events: 1. squashfs_read_inode() is called to read the symbolic link from disk. This assigns the corrupted value 3875536935 to inode->i_size. 2. Later squashfs_symlink_read_folio() is called, which assigns this corrupted value to the length variable, which being a signed int, overflows producing a negative number. 3. The following loop that fills in the page contents checks that the copied bytes is less than length, which being negative means the loop is skipped, producing an uninitialised page. This patch adds a sanity check which checks that the symbolic link size is not larger than expected. -- V2: fix spelling mistake.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 2 years later
· 2 years 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 77% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < f82cb7f24032ed023fc67d26ea9bf322d8431a90
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < 1b9451ba6f21478a75288ea3e3fca4be35e2a438
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < 5c8906de98d0d7ad42ff3edf2cb6cd7e0ea658c4
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < 087f25b2d36adae19951114ffcbb7106ed405ebb
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < fac5e82ab1334fc8ed6ff7183702df634bd1d93d
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < c3af7e460a526007e4bed1ce3623274a1a6afe5e
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < ef4e249971eb77ec33d74c5c3de1e2576faf6c90
- affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 – < 810ee43d9cd245d138a2733d87a24858a23f577d
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 4.19.322 – ≤ 4.19.*
- unaffected 5.4.284 – ≤ 5.4.*
- unaffected 5.10.226 – ≤ 5.10.*
- unaffected 5.15.167 – ≤ 5.15.*
- unaffected 6.1.110 – ≤ 6.1.*
- unaffected 6.6.51 – ≤ 6.6.*
- unaffected 6.10.10 – ≤ 6.10.*
- unaffected 6.11 – ≤ *
References
References12
- https://git.kernel.org/stable/c/f82cb7f24032ed023fc67d26ea9bf322d8431a90 (opens in a new tab)
- https://git.kernel.org/stable/c/1b9451ba6f21478a75288ea3e3fca4be35e2a438 (opens in a new tab)
- https://git.kernel.org/stable/c/5c8906de98d0d7ad42ff3edf2cb6cd7e0ea658c4 (opens in a new tab)
- https://git.kernel.org/stable/c/087f25b2d36adae19951114ffcbb7106ed405ebb (opens in a new tab)
- https://git.kernel.org/stable/c/fac5e82ab1334fc8ed6ff7183702df634bd1d93d (opens in a new tab)
- https://git.kernel.org/stable/c/c3af7e460a526007e4bed1ce3623274a1a6afe5e (opens in a new tab)
- https://git.kernel.org/stable/c/ef4e249971eb77ec33d74c5c3de1e2576faf6c90 (opens in a new tab)
- https://git.kernel.org/stable/c/810ee43d9cd245d138a2733d87a24858a23f577d (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html (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)
- EUVD EUVD-2024-42005 (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-2024-46744)Record last updated .