CVE-2026-53160misc: fastrpc: fix use-after-free race in fastrpc_map_create
- 7.8HighCVSS base score
- 0.13%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: misc: fastrpc: fix use-after-free race in fastrpc_map_create fastrpc_map_lookup returns a raw pointer after releasing fl->lock. The caller fastrpc_map_create then calls fastrpc_map_get (kref_get_unless_zero) on this unprotected pointer. A concurrent MEM_UNMAP can free the map between the lock release and the kref operation, resulting in a use-after-free on the freed slab object. Restore the take_ref parameter to fastrpc_map_lookup so the reference is acquired atomically under fl->lock before the pointer is exposed to the caller.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 41 days later
· 41 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 · Analyzed | 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 98% of all CVEs (12 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 0b70ec82b309a4093106ff399da1911ad23b52d3 – < 0a3b87293fbd34fda651e6aead9964f84b893962
- affected d7513b47082c08105e837b06cebeb3f07a5fa56f – < 8b080c89183196fd3e49212f2a1a1c4a29335b9c
- affected 802359a52676176b18713e33caa17572ad009057 – < 5b0166112019d1dce30b976ab28fd67f7f0be532
- affected 10df039834f84a297c72ec962c0f9b7c8c5ca31a – < 992f121796b7ca83a5a8b93da24e971363206218
- affected 10df039834f84a297c72ec962c0f9b7c8c5ca31a – < f20f6512ecb75c816e0debf4551a138f098615c4
- affected 10df039834f84a297c72ec962c0f9b7c8c5ca31a – < 07ebe87915d8accdaba20c4f88c5ae430fe62fbb
- affected f3f59bab68e9bc714f757ab22f3fb36153014043
- affected 6.1.156 – < 6.1.176
- affected 6.6.112 – < 6.6.143
- affected 6.12.53 – < 6.12.94
- affected 6.17.3 – < 6.18
- affected 6.18
- unaffected < 6.18
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.94 – ≤ 6.12.*
- unaffected 6.18.36 – ≤ 6.18.*
- unaffected 7.0.13 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962 (opens in a new tab)
- https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c (opens in a new tab)
- https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532 (opens in a new tab)
- https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218 (opens in a new tab)
- https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4 (opens in a new tab)
- https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb (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-2026-39251 (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-2026-53160)Record last updated .