CVE-2026-23043
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix NULL pointer dereference in do_abort_log_replay() Coverity reported a NULL pointer dereference issue (CID 1666756) in do_abort_log_replay(). When btrfs_alloc_path() fails in replay_one_buffer(), wc->subvol_path is NULL, but btrfs_abort_log_replay() calls do_abort_log_replay() which unconditionally dereferences wc->subvol_path when attempting to print debug information. Fix this by adding a NULL check before dereferencing wc->subvol_path in do_abort_log_replay().
Affected versions
Linux kernel versions
6.18
and later are affected. Fixed in
6.18.6,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2026-23043 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/530e3d4af566ca44807d79359b90794dea24c4f3
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PatchKernel patch commithttps://git.kernel.org/stable/c/6d1b61b8e1e44888c643d89225ab819b10649b2e
Frequently asked questions
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What is CVE-2026-23043?
CVE-2026-23043 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.6 and 6.19. CVE-2026-23043 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-2026-23043?
Yes — CVE-2026-23043 has been patched. Fixed versions include 6.18.6 and 6.19. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-23043 actively exploited?
No — CVE-2026-23043 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.