PT-2026-64728 · Linux · Linux

CVE-2026-64507 · Published 2026-07-25 · Updated 2026-07-25

NVD

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.

Related Identifiers

CVE-2026-64507

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-64507 · Security Note
• https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35 · Note
• https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d · Note
• https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df · Note
• https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37 · Note
• https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 · Note