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Vulnerability record · CVE-2026-53160 · published 25 June 2026

CVE-2026-53160: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 98.1% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
6 Jul 2026Last modified by NVD

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/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb Patch
https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962 Patch
https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532 Patch
https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c Patch
https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218 Patch
https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53160), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.