CVE-2024-35880io_uring/kbuf: hold io_buffer_list reference over mmap
- 7.8HighCVSS base score
- 0.69%Exploitation in 30 daysEPSS · top 47% 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: io_uring/kbuf: hold io_buffer_list reference over mmap If we look up the kbuf, ensure that it doesn't get unregistered until after we're done with it. Since we're inside mmap, we cannot safely use the io_uring lock. Rely on the fact that we can lookup the buffer list under RCU now and grab a reference to it, preventing it from being unregistered until we're done with it. The lookup returns the io_buffer_list directly with it referenced.
Timeline
ID reserved
By Linux
- 2 days later
· 2 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 |
|---|---|---|---|
| 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 | 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)
- 0.69% · top 47% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 09f7520048eaaee9709091cd2787966f807da7c5 – < 65938e81df2197203bda4b9a0c477e7987218d66
- affected 5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 – < 5fd8e2359498043e0b5329a05f02d10a9eb91eb9
- affected 5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 – < 561e4f9451d65fc2f7eef564e0064373e3019793
- affected 6.6.5 – < 6.6.26
- affected 6.7
- unaffected < 6.7
- unaffected 6.6.26 – ≤ 6.6.*
- unaffected 6.8.5 – ≤ 6.8.*
- unaffected 6.9 – ≤ *
References
References3
- https://git.kernel.org/stable/c/65938e81df2197203bda4b9a0c477e7987218d66 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/5fd8e2359498043e0b5329a05f02d10a9eb91eb9 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/561e4f9451d65fc2f7eef564e0064373e3019793 (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-2024-35598 (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-2024-35880)Record last updated .