CVE-2026-45974
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix invalid leaf access in btrfs_quota_enable() if ref key not found If btrfs_search_slot_for_read() returns 1, it means we did not find any key greater than or equals to the key we asked for, meaning we have reached the end of the tree and therefore the path is not valid. If this happens we need to break out of the loop and stop, instead of continuing and accessing an invalid path.
Affected versions
Linux kernel versions
5.9.7,
5.10
and later are affected. Fixed in
5.10.252,
5.15.202,
6.1.165,
6.6.128,
6.12.75,
6.18.14,
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45974 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/023545e272f369d487e6a986c1e321c6e04be1da
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PatchKernel patch commithttps://git.kernel.org/stable/c/0761447f6f51e1c7997960d8e6559337deed6729
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PatchKernel patch commithttps://git.kernel.org/stable/c/1ee1d006c9fe4d6be5527ab1c84216b80cccbe40
Frequently asked questions
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What is CVE-2026-45974?
CVE-2026-45974 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.9.7 onward and has been patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-45974 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-2026-45974?
Yes — CVE-2026-45974 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 5.9.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45974 actively exploited?
No — CVE-2026-45974 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.