Bug 2400810 (CVE-2023-53457)

Summary: CVE-2023-53457 kernel: FS: JFS: Fix null-ptr-deref Read in txBegin
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-01 12:08:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

FS: JFS: Fix null-ptr-deref Read in txBegin

 Syzkaller reported an issue where txBegin may be called
 on a superblock in a read-only mounted filesystem which leads
 to NULL pointer deref. This could be solved by checking if
 the filesystem is read-only before calling txBegin, and returning
 with appropiate error code.
Comment 1 Jon Moroney 2025-10-01 18:14:54 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100105-CVE-2023-53457-629a@gregkh/T