CVE-2026-64507
In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Enable IBPB flush on BPF JIT allocation Enable hardening against JIT spraying when Spectre-v2 mitigations are in use. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip enabling the IBPB flush if the BPF dispatcher is already using a retpoline sequence. This hardening applies only when BPF-JIT is in use. Guard the enabling under CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n.
Affected versions
Linux kernel versions
5.18
and later are affected. Fixed in
6.1.183,
6.6.145,
6.12.97,
6.18.39,
7.1.4,
7.2
and their respective stable series.
References
6 totalFrequently asked questions
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What is CVE-2026-64507?
CVE-2026-64507 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.18 onward and has been patched in 6.1.183, 6.6.145, 6.12.97 and others. CVE-2026-64507 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-2026-64507?
Yes. CVE-2026-64507 has been patched. Fixed versions include 6.1.183, 6.6.145, 6.12.97 and others. If you are running Linux kernel 5.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64507 actively exploited?
No. CVE-2026-64507 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.