Bug 2432363 (CVE-2025-71153)

Summary: CVE-2025-71153 kernel: Linux kernel ksmbd: Memory leak leading to denial of service
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's ksmbd component. This memory leak vulnerability occurs in the `get_file_all_info()` function when `vfs_getattr()` fails, causing the allocated filename not to be freed. A local attacker could exploit this to exhaust system memory, leading to a denial of service (DoS).
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Description OSIDB Bzimport 2026-01-23 15:02:32 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: Fix memory leak in get_file_all_info()

In get_file_all_info(), if vfs_getattr() fails, the function returns
immediately without freeing the allocated filename, leading to a memory
leak.

Fix this by freeing the filename before returning in this error case.
Comment 1 Keith Grant 2026-01-23 18:22:06 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012305-CVE-2025-71153-246e@gregkh/T