CVE-2024-40935
cachefiles: flush all requests after setting CACHEFILES_DEAD
At a glance
- Source
- NVD
- EPSS
- EPSS 0.26 % · percentile 18 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: cachefiles: flush all requests after setting CACHEFILES_DEAD In ondemand mode, when the daemon is processing an open request, if the kernel flags the cache as CACHEFILES_DEAD, the cachefiles_daemon_write() will always return -EIO, so the daemon can't pass the copen to the kernel. Then the kernel process that is waiting for the copen triggers a hung_task. Since the DEAD state is irreversible, it can only be exited by closing /dev/cachefiles. Therefore, after calling cachefiles_io_error() to mark the cache as CACHEFILES_DEAD, if in ondemand mode, flush all requests to avoid the above hungtask. We may still be able to read some of the cached data before closing the fd of /dev/cachefiles. Note that this relies on the patch that adds reference counting to the req, otherwise it may UAF.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0
- https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081
- https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00
- https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2024-38823
- GCVE · GCVE-0-2024-40935
CERT-FR advisories
- CERTFR-2025-AVI-0002 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0823 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0799 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0778 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0717 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0693 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0669 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0613 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.19 < 6.1.95cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.35cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.9.6cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected c8383054506c77b814489c09877b5db83fd4abf2 < 320ba9cbca78be79c912143bbba1d1b35ca55cf0 ; affected c8383054506c77b814489c09877b5db83fd4abf2 < 3bf0b8030296e9ee60d3d4c15849ad9ac0b47081 ; affected c8383054506c77b814489c09877b5db83fd4abf2 < e73fac95084839c5178d97e81c6a2051251bdc00 ; affected c8383054506c77b814489c09877b5db83fd4abf2 < 85e833cd7243bda7285492b0653c3abb1e2e757b |
| Linux · Linux | affected 5.19 ; unaffected 0 < 5.19 ; unaffected 6.1.95 ≤ 6.1.* ; unaffected 6.6.35 ≤ 6.6.* ; unaffected 6.9.6 ≤ 6.9.* ; unaffected 6.10 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |