CVE-2026-53160
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.17% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbbPatch
- https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962Patch
- https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532Patch
- https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9cPatch
- https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218Patch
- https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.