CVE-2026-64353
In the Linux kernel, the following vulnerability has been resolved: bpf: Keep dynamic inner array lookups nullable An ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its inner map template. A concrete inner array with a different max_entries value can then replace the template. After a successful outer map lookup, the verifier represents the resulting map pointer using the inner map template. Const-key lookup nullness elision consequently uses the template max_entries even though the runtime helper uses the concrete inner map max_entries. Do not elide lookup result nullness for maps marked with BPF_F_INNER_MAP, because the template max_entries does not prove that the key is in bounds for the concrete runtime map.
Affected versions
Linux kernel versions
6.14
and later are affected. Fixed in
6.18.40,
7.1.4,
7.2-rc1
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-64353?
CVE-2026-64353 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.14 onward and has been patched in 6.18.40, 7.1.4 and 7.2-rc1. CVE-2026-64353 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-2026-64353?
Yes. CVE-2026-64353 has been patched. Fixed versions include 6.18.40, 7.1.4 and 7.2-rc1. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64353 actively exploited?
No. CVE-2026-64353 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.