Bug 2426018 (CVE-2023-54264)

Summary: CVE-2023-54264 kernel: fs/sysv: Null check to prevent null-ptr-deref bug
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 2025-12-30 13:02:23 UTC 
In the Linux kernel, the following vulnerability has been resolved:

fs/sysv: Null check to prevent null-ptr-deref bug

sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.
Comment 1 Alexander B 2025-12-31 15:18:01 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123058-CVE-2023-54264-64bd@gregkh/T