CVE-2025-71295fs/buffer: add alert in try_to_free_buffers() for folios without buffers
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% 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: fs/buffer: add alert in try_to_free_buffers() for folios without buffers try_to_free_buffers() can be called on folios with no buffers attached when filemap_release_folio() is invoked on a folio belonging to a mapping with AS_RELEASE_ALWAYS set but no release_folio operation defined. In such cases, folio_needs_release() returns true because of the AS_RELEASE_ALWAYS flag, but the folio has no private buffer data. This causes try_to_free_buffers() to call drop_buffers() on a folio with no buffers, leading to a null pointer dereference. Adding a check in try_to_free_buffers() to return early if the folio has no buffers attached, with WARN_ON_ONCE() to alert about the misconfiguration. This provides defensive hardening.
Timeline
ID reserved
By Linux
Published
- 6 months later
· 6 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 · Analyzed | 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)
- 0.12% · top 98% of all CVEs (13 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: Medium 5.5.
Affected products
- affected d0eafc763135508be118dac208887a26c0adb74d – < 1b111a69a6e33a922622bf9870e4e63fb2b649c8
- affected b4fa966f03b7401ceacd4ffd7227197afb2b8376 – < c1b6227555c52781178132b7a06466711855795c
- affected b4fa966f03b7401ceacd4ffd7227197afb2b8376 – < 727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3
- affected b4fa966f03b7401ceacd4ffd7227197afb2b8376 – < 42c32d7571ccd8ef32351cac506f00b0fae99fd2
- affected b4fa966f03b7401ceacd4ffd7227197afb2b8376 – < c6246ca15999053d2632fbcc7b86e6eef7f077cb
- affected b4fa966f03b7401ceacd4ffd7227197afb2b8376 – < b68f91ef3b3fe82ad78c417de71b675699a8467c
- affected 6.1.72 – < 6.1.165
- affected 6.6
- unaffected < 6.6
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.16 – ≤ 6.18.*
- unaffected 6.19.6 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References6
- https://git.kernel.org/stable/c/1b111a69a6e33a922622bf9870e4e63fb2b649c8 (opens in a new tab)
- https://git.kernel.org/stable/c/c1b6227555c52781178132b7a06466711855795c (opens in a new tab)
- https://git.kernel.org/stable/c/727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3 (opens in a new tab)
- https://git.kernel.org/stable/c/42c32d7571ccd8ef32351cac506f00b0fae99fd2 (opens in a new tab)
- https://git.kernel.org/stable/c/c6246ca15999053d2632fbcc7b86e6eef7f077cb (opens in a new tab)
- https://git.kernel.org/stable/c/b68f91ef3b3fe82ad78c417de71b675699a8467c (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-2025-209685 (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-2025-71295)Record last updated .