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.

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No CVSS v3.1

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Affected Vendors & Products

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Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb cve-icon
https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962 cve-icon
https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532 cve-icon
https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c cve-icon
https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218 cve-icon
https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4 cve-icon
History

Thu, 25 Jun 2026 11:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
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.
Title misc: fastrpc: fix use-after-free race in fastrpc_map_create
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-25T08:38:42.138Z

Reserved: 2026-06-09T07:44:35.388Z

Link: CVE-2026-53160

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

Updated: 2026-06-25T10:45:16Z