CVE-2022-48872 (GCVE-0-2022-48872)
Vulnerability from cvelistv5
Published
2024-08-21 06:10
Modified
2026-05-11 18:48
Severity ?
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
References
Impacted products
Vendor Product Version
Linux Linux Version: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988
Version: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988
Version: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988
Version: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988
Version: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988
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