Bug 2422774 (CVE-2025-68252)

Summary: CVE-2025-68252 kernel: misc: fastrpc: Fix dma_buf object leak in fastrpc_map_lookup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-16 15:04:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

misc: fastrpc: Fix dma_buf object leak in fastrpc_map_lookup

In fastrpc_map_lookup, dma_buf_get is called to obtain a reference to
the dma_buf for comparison purposes. However, this reference is never
released when the function returns, leading to a dma_buf memory leak.

Fix this by adding dma_buf_put before returning from the function,
ensuring that the temporarily acquired reference is properly released
regardless of whether a matching map is found.

Rule: add
Comment 1 Alexander B 2025-12-16 21:07:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121624-CVE-2025-68252-5763@gregkh/T