CVE-2024-35872mm/secretmem: fix GUP-fast succeeding on secretmem folios
- 7.8HighCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 85% 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: mm/secretmem: fix GUP-fast succeeding on secretmem folios folio_is_secretmem() currently relies on secretmem folios being LRU folios, to save some cycles. However, folios might reside in a folio batch without the LRU flag set, or temporarily have their LRU flag cleared. Consequently, the LRU flag is unreliable for this purpose. In particular, this is the case when secretmem_fault() allocates a fresh page and calls filemap_add_folio()->folio_add_lru(). The folio might be added to the per-cpu folio batch and won't get the LRU flag set until the batch was drained using e.g., lru_add_drain(). Consequently, folio_is_secretmem() might not detect secretmem folios and GUP-fast can succeed in grabbing a secretmem folio, crashing the kernel when we would later try reading/writing to the folio, because the folio has been unmapped from the directmap. Fix it by removing that unreliable check.
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)
- 0.24% · top 85% 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 1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 – < 6564b014af92b677c1f07c44d7f5b595d589cf6e
- affected 1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 – < 9c2b4b657739ecda38e3b383354a29566955ac48
- affected 1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 – < 43fad1d0284de30159661d0badfc3cbaf7e6f8f8
- affected 1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 – < 201e4aaf405dfd1308da54448654053004c579b5
- affected 1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 – < 65291dcfcf8936e1b23cfd7718fdfde7cfaf7706
- affected 5.14
- unaffected < 5.14
- unaffected 5.15.154 – ≤ 5.15.*
- unaffected 6.1.85 – ≤ 6.1.*
- unaffected 6.6.26 – ≤ 6.6.*
- unaffected 6.8.5 – ≤ 6.8.*
- unaffected 6.9 – ≤ *
References
References5
- https://git.kernel.org/stable/c/6564b014af92b677c1f07c44d7f5b595d589cf6e (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/9c2b4b657739ecda38e3b383354a29566955ac48 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/43fad1d0284de30159661d0badfc3cbaf7e6f8f8 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/201e4aaf405dfd1308da54448654053004c579b5 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/65291dcfcf8936e1b23cfd7718fdfde7cfaf7706 (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-2024-35590 (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-2024-35872)Record last updated .