CVE-2022-48872 (GCVE-0-2022-48872)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2025-05-04 08:25
VLAI?
Title
misc: fastrpc: Fix use-after-free race condition for maps
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix use-after-free race condition for maps It is possible that in between calling fastrpc_map_get() until map->fl->lock is taken in fastrpc_free_map(), another thread can call fastrpc_map_lookup() and get a reference to a map that is about to be deleted. Rewrite fastrpc_map_get() to only increase the reference count of a map if it's non-zero. Propagate this to callers so they can know if a map is about to be deleted. Fixes this warning: refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate ... Call trace: refcount_warn_saturate [fastrpc_map_get inlined] [fastrpc_map_lookup inlined] fastrpc_map_create fastrpc_internal_invoke fastrpc_device_ioctl __arm64_sys_ioctl invoke_syscall
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 556dfdb226ce1e5231d8836159b23f8bb0395bf4 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < b171d0d2cf1b8387c72c8d325c5d5746fa271e39 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 61a0890cb95afec5c8a2f4a879de2b6220984ef1 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 079c78c68714f7d8d58e66c477b0243b31806907 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 96b328d119eca7563c1edcc4e1039a62e6370ecb (git)
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    Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.230 , ≤ 5.4.* (semver)
Unaffected: 5.10.165 , ≤ 5.10.* (semver)
Unaffected: 5.15.90 , ≤ 5.15.* (semver)
Unaffected: 6.1.8 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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