CVE-2026-74646misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke When an invoke is interrupted by a signal, wait_for_completion_interruptible() returns -ERESTARTSYS and fastrpc_internal_invoke() moves every buffer from fl->mmaps onto cctx->invoke_interrupted_mmaps. This list_del()/list_add_tail() walk runs without holding fl->lock, the lock that serialises fl->mmaps in fastrpc_req_mmap() and fastrpc_req_munmap() everywhere else. Take fl->lock around the move, matching every other fl->mmaps accessor.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 3 days later
· 3 days 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 · Received | 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)
- 0.13% · top 97% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc – < 3f265e405e5ef85030c3777262e18bb556bc8724
- affected 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc – < a902fe1f80f58a2335b6be1131866f827ec44d1a
- affected 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc – < af6345159abcbaa550518f31990d2a9558c2d369
- affected 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc – < efd02f8d1a7449f15809bc18d3cd41aafea75d7e
- affected 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc – < b85a0e91d7d6cd06a53c881a46f749cfcef416a2
- affected 6.2
- unaffected < 6.2
- unaffected 6.6.152 – ≤ 6.6.*
- unaffected 6.12.104 – ≤ 6.12.*
- unaffected 6.18.45 – ≤ 6.18.*
- unaffected 7.1.9 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References5
- https://git.kernel.org/stable/c/3f265e405e5ef85030c3777262e18bb556bc8724 (opens in a new tab)
- https://git.kernel.org/stable/c/a902fe1f80f58a2335b6be1131866f827ec44d1a (opens in a new tab)
- https://git.kernel.org/stable/c/af6345159abcbaa550518f31990d2a9558c2d369 (opens in a new tab)
- https://git.kernel.org/stable/c/efd02f8d1a7449f15809bc18d3cd41aafea75d7e (opens in a new tab)
- https://git.kernel.org/stable/c/b85a0e91d7d6cd06a53c881a46f749cfcef416a2 (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-2026-64583 (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-2026-74646)Record last updated .