CVE-2026-64507
x86/bugs: Enable IBPB flush on BPF JIT allocation
EPSS 0.2%
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
- Linux
- EPSS
- 0.16% chance of exploitation in the next 30 days, 5th percentile
- Published
- 2026-07-25
- Updated
- 2026-08-19