CVE-2024-43845udf: Fix bogus checksum computation in udf_rename()
- 7.8HighCVSS base score
- 0.22%Exploitation in 30 daysEPSS · top 87% 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: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.
Timeline
ID reserved
By Linux
Published
- 24 months later
· 24 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:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Low3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% 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 626860c470ff88e5f7f22a282efd1bfe953a1b54 – < 9c439311c13fc6faab1921441165c9b8b500c83b
- affected e9109a92d2a95889498bed3719cd2318892171a2 – < fe2ead240c31e8d158713beca9d0681a6e6a53ab
- affected e9109a92d2a95889498bed3719cd2318892171a2 – < 40d7b3ed52449d36143bab8d3e70926aa61a60f4
- affected e9109a92d2a95889498bed3719cd2318892171a2 – < 27ab33854873e6fb958cb074681a0107cc2ecc4c
- affected 6.3
- unaffected < 6.3
- unaffected 6.6.44 – ≤ 6.6.*
- unaffected 6.10.3 – ≤ 6.10.*
- unaffected 6.11 – ≤ *
References
References4
- https://git.kernel.org/stable/c/9c439311c13fc6faab1921441165c9b8b500c83b (opens in a new tab)
- https://git.kernel.org/stable/c/fe2ead240c31e8d158713beca9d0681a6e6a53ab (opens in a new tab)
- https://git.kernel.org/stable/c/40d7b3ed52449d36143bab8d3e70926aa61a60f4 (opens in a new tab)
- https://git.kernel.org/stable/c/27ab33854873e6fb958cb074681a0107cc2ecc4c (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-2024-40495 (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-2024-43845)Record last updated .