CVE-2025-21789LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
- 7.3HighCVSS base score
- 0.23%Exploitation in 30 daysEPSS · top 86% 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: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths Commit 69e3a6aa6be2 ("LoongArch: Add checksum optimization for 64-bit system") would cause an undefined shift and an out-of-bounds read. Commit 8bd795fedb84 ("arm64: csum: Fix OoB access in IP checksum code for negative lengths") fixes the same issue on ARM64.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 17 months later
· 17 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 | High7.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (14 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 7.3.
Affected products
- affected 69e3a6aa6be21de6aaf38130fad97ecde34a193c – < 964a8895704a22efc06a2a3276b624a5ae985a06
- affected 69e3a6aa6be21de6aaf38130fad97ecde34a193c – < 9f15a8df542c0f08732a67d1a14ee7c22948fb97
- affected 69e3a6aa6be21de6aaf38130fad97ecde34a193c – < d6508ffff32b44b6d0de06704034e4eef1c307a7
- affected 69e3a6aa6be21de6aaf38130fad97ecde34a193c – < 6287f1a8c16138c2ec750953e35039634018c84a
- affected 6.4
- unaffected < 6.4
- unaffected 6.6.79 – ≤ 6.6.*
- unaffected 6.12.16 – ≤ 6.12.*
- unaffected 6.13.4 – ≤ 6.13.*
- unaffected 6.14 – ≤ *
References
References4
- https://git.kernel.org/stable/c/964a8895704a22efc06a2a3276b624a5ae985a06 (opens in a new tab)
- https://git.kernel.org/stable/c/9f15a8df542c0f08732a67d1a14ee7c22948fb97 (opens in a new tab)
- https://git.kernel.org/stable/c/d6508ffff32b44b6d0de06704034e4eef1c307a7 (opens in a new tab)
- https://git.kernel.org/stable/c/6287f1a8c16138c2ec750953e35039634018c84a (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-2025-5144 (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-2025-21789)Record last updated .