CVE-2026-64507
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.
Metadata
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Linux | Linux | — | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cb27f3bf915cc0f20fc0c48da9059304e39ebd35, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9354248fc1c33a844ca1872761f6668b393e8c37, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 52440e15d9628f8f239373c0f2e5e8f92feea2df … |
| Linux | Linux | — | 6.6.145 ≤ 6.6.*, 6.12.97 ≤ 6.12.*, 6.18.39 ≤ 6.18.*, 7.1.4 ≤ 7.1.* … |
References (5)
- https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35
- https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37
- https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1
- https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df
- https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d