CVE-2026-45893
In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix & Optimize table creation from possibly unaligned memory Source blob may come from userspace and might be unaligned. Try to optize the copying process by avoiding unaligned memory accesses. - Added Fixes tag - Added "Fix &" to description as this doesn't just optimize but fixes a potential unaligned memory access [jj: remove duplicate word "convert" in comment trigger checkpatch warning]
Affected versions
Linux kernel versions
4.11
and later are affected. Fixed in
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-2026-45893 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/226c3b10aab23f73b03c47e7773107de56ba3a4e
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PatchKernel patch commithttps://git.kernel.org/stable/c/47e351dfef60ab0e3285133556e1a9c7f646a969
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PatchKernel patch commithttps://git.kernel.org/stable/c/6fc367bfd4c8886e6b1742aabbd1c0bdc310db3a
Frequently asked questions
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What is CVE-2026-45893?
CVE-2026-45893 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.11 onward and has been patched in 6.12.75, 6.18.14, 6.19.4 and others. CVE-2026-45893 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-2026-45893?
Yes — CVE-2026-45893 has been patched. Fixed versions include 6.12.75, 6.18.14, 6.19.4 and others. If you are running Linux kernel 4.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45893 actively exploited?
No — CVE-2026-45893 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.