CVE-2023-53867
In the Linux kernel, the following vulnerability has been resolved: ceph: fix potential use-after-free bug when trimming caps When trimming the caps and just after the 'session->s_cap_lock' is released in ceph_iterate_session_caps() the cap maybe removed by another thread, and when using the stale cap memory in the callbacks it will trigger use-after-free crash. We need to check the existence of the cap just after the 'ci->i_ceph_lock' being acquired. And do nothing if it's already removed.
Affected versions
Linux kernel versions
2.6.34
and later are affected. Fixed in
6.1.28,
6.2.15,
6.3.2,
6.4
and their respective stable series.
References
The following references provide additional information about CVE-2023-53867 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/2b2515b8095cf2149bef44383a99d5b5677f1831
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PatchKernel patch commithttps://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb
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PatchKernel patch commithttps://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800
Frequently asked questions
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What is CVE-2023-53867?
CVE-2023-53867 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.34 onward and has been patched in 6.1.28, 6.2.15, 6.3.2 and others. CVE-2023-53867 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-2023-53867?
Yes — CVE-2023-53867 has been patched. Fixed versions include 6.1.28, 6.2.15, 6.3.2 and others. If you are running Linux kernel 2.6.34 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2023-53867 actively exploited?
No — CVE-2023-53867 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.