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Vulnerabilities CVE-2026-64507

CVE-2026-64507

None
Open
TLP:CLEAR

x86/bugs: Enable IBPB flush on BPF JIT allocation

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Description

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.

Details

EPSS Score
0.16%

5.3th percentile

Confidence
90%
Published
Jul 25, 2026
Last Modified
Jul 25, 2026
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