Bug 2396423 (CVE-2023-53391)

Summary: CVE-2023-53391 kernel: shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs
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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Description OSIDB Bzimport 2025-09-18 14:04:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs

As the ramfs-based tmpfs uses ramfs_init_fs_context() for the
init_fs_context method, which allocates fc->s_fs_info, use ramfs_kill_sb()
to free it and avoid a memory leak.
Comment 1 Keith Grant 2025-09-18 17:06:28 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091858-CVE-2023-53391-cea3@gregkh/T