- 7.8HighCVSS base score
- 0.28%Exploitation in 30 daysEPSS · top 80% 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: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.
Timeline
ID reserved
By Linux
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 |
|---|---|---|---|
| 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 | 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)
- 0.28% · top 80% 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 ac48dc6ac9240f73bf08d29edf65c2deca93ee5d – < e8ccda39b395169622855607085cdeef4d376e0f
- affected 876941f533e7b47fc69977fc4551c02f2d18af97 – < 91cff53136daeff50816b0baeafd38a6976f6209
- affected 1a80dbcb2dbaf6e4c216e62e30fa7d3daa8001ce – < fa97b8fed9896f1e89cb657513e483a152d4c382
- affected 1a80dbcb2dbaf6e4c216e62e30fa7d3daa8001ce – < 2884dc7d08d98a89d8d65121524bb7533183a63a
- affected 5d8d447777564b35f67000e7838e7ccb64d525c8
- affected 6.6.26 – < 6.6.35
- affected 6.8.5 – < 6.9
- affected 6.9
- unaffected < 6.9
- unaffected 6.6.35 – ≤ 6.6.*
- unaffected 6.9.6 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References4
- https://git.kernel.org/stable/c/e8ccda39b395169622855607085cdeef4d376e0f (opens in a new tab)
- https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a (opens in a new tab)x_transferred
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-2024-38720 (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-2024-40909)Record last updated .