CVE-2026-45848
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix NULL sock in aa_sock_file_perm Deal with the potential that sock and sock-sk can be NULL during socket setup or teardown. This could lead to an oops. The fix for NULL pointer dereference in __unix_needs_revalidation shows this is at least possible for af_unix sockets. While the fix for af_unix sockets applies for newer mediation this is still the fall back path for older af_unix mediation and other sockets, so ensure it is covered.
Affected versions
Linux kernel versions
4.17
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-2026-45848 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/00b67657535dfea56e84d11492f5c0f61d0af297
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PatchKernel patch commithttps://git.kernel.org/stable/c/0dc19bca22606f7a61d5988408f74e3ae0ef3486
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PatchKernel patch commithttps://git.kernel.org/stable/c/3852eb9a0392eb435c03dcb47d581bcfe6a9a95b
Frequently asked questions
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What is CVE-2026-45848?
CVE-2026-45848 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.17 onward and has been patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-45848 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-2026-45848?
Yes — CVE-2026-45848 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 4.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45848 actively exploited?
No — CVE-2026-45848 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.