CVE-2024-40913cachefiles: defer exposing anon_fd until after copy_to_user() succeeds
- 7.8HighCVSS base score
- 0.29%Exploitation in 30 daysEPSS · top 78% 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: cachefiles: defer exposing anon_fd until after copy_to_user() succeeds After installing the anonymous fd, we can now see it in userland and close it. However, at this point we may not have gotten the reference count of the cache, but we will put it during colse fd, so this may cause a cache UAF. So grab the cache reference count before fd_install(). In addition, by kernel convention, fd is taken over by the user land after fd_install(), and the kernel should not call close_fd() after that, i.e., it should call fd_install() after everything is ready, thus fd_install() is called after copy_to_user() succeeds.
Timeline
ID reserved
By Linux
Published
- 22 months later
· 22 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 |
|---|---|---|---|
| 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)
- 0.29% · top 78% 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 c8383054506c77b814489c09877b5db83fd4abf2 – < eac51d9daacd61dcc93333ff6a890cf3efc8c1c0
- affected c8383054506c77b814489c09877b5db83fd4abf2 – < d2d3eb377a5d081bf2bed177d354a4f59b74da88
- affected c8383054506c77b814489c09877b5db83fd4abf2 – < b9f58cdae6a364a3270fd6b6a46e0fd4f7f8ce32
- affected c8383054506c77b814489c09877b5db83fd4abf2 – < 4b4391e77a6bf24cba2ef1590e113d9b73b11039
- affected 5.19
- unaffected < 5.19
- unaffected 6.1.95 – ≤ 6.1.*
- unaffected 6.6.35 – ≤ 6.6.*
- unaffected 6.9.6 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References5
- https://git.kernel.org/stable/c/eac51d9daacd61dcc93333ff6a890cf3efc8c1c0 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/d2d3eb377a5d081bf2bed177d354a4f59b74da88 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b9f58cdae6a364a3270fd6b6a46e0fd4f7f8ce32 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/4b4391e77a6bf24cba2ef1590e113d9b73b11039 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.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-2024-38724 (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-2024-40913)Record last updated .