CVE-2023-54140
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse A syzbot stress test using a corrupted disk image reported that mark_buffer_dirty() called from __nilfs_mark_inode_dirty() or nilfs_palloc_commit_alloc_entry() may output a kernel warning, and can panic if the kernel is booted with panic_on_warn. This is because nilfs2 keeps buffer pointers in local structures for some metadata and reuses them, but such buffers may be forcibly discarded by nilfs_clear_dirty_page() in some critical situations. This issue is reported to appear after commit 28a65b49eb53 ("nilfs2: do not write dirty data after degenerating to read-only"), but the issue has potentially existed before. Fix this issue by checking the uptodate flag when attempting to reuse an internally held buffer, and reloading the metadata instead of reusing the buffer if the flag was lost.
Affected versions
Linux kernel versions
3.10
and later are affected. Fixed in
4.14.326,
4.19.295,
5.4.257,
5.10.195,
5.15.131,
6.1.52,
6.4.15,
6.5.2,
6.6
and their respective stable series.
References
The following references provide additional information about CVE-2023-54140 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/46c11be2dca295742a5508ea910a77f7733fb7f4
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PatchKernel patch commithttps://git.kernel.org/stable/c/473795610594f261e98920f0945550314df36f07
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PatchKernel patch commithttps://git.kernel.org/stable/c/4da07e958bfda2d69d83db105780e8916e3ac02e
Frequently asked questions
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What is CVE-2023-54140?
CVE-2023-54140 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.10 onward and has been patched in 4.14.326, 4.19.295, 5.4.257 and others. CVE-2023-54140 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2023-54140?
Yes — CVE-2023-54140 has been patched. Fixed versions include 4.14.326, 4.19.295, 5.4.257 and others. If you are running Linux kernel 3.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2023-54140 actively exploited?
No — CVE-2023-54140 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.