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.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 25dbcd31781e2bc3cd63d873af1fcd06f863a126; >= 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < cb27f3bf915cc0f20fc0c48da9059304e39ebd35; >= 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 9354248fc1c33a844ca1872761f6668b393e8c37; >= 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1; >= 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 52440e15d9628f8f239373c0f2e5e8f92feea2df; >= 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < a3af84b0fa00ead01fcd0e28b5d773ff25990a0d |
| Linux | Linux | 5.18 |
References
- https://git.kernel.org/stable/c/25dbcd31781e2bc3cd63d873af1fcd06f863a126Patch
- https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2dfPatch
- https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1Patch
- https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37Patch
- https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0dPatch
- https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35Patch
Timeline
- Published
- Jul 25, 2026
- Last modified
- Nov 12, 2026
- NVD status
- Analyzed