CVE-2026-64507
x86/bugs: Enable IBPB flush on BPF JIT allocation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 25, 2026 |
| Last Updated | Jul 27, 2026 |
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Affected Versions
Linux / Linux
57631054fae6dcc9c892ae6310b58bbb6f6e5048 < cb27f3bf915cc0f20fc0c48da9059304e39ebd35 57631054fae6dcc9c892ae6310b58bbb6f6e5048 < 9354248fc1c33a844ca1872761f6668b393e8c37 57631054fae6dcc9c892ae6310b58bbb6f6e5048 < 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 57631054fae6dcc9c892ae6310b58bbb6f6e5048 < 52440e15d9628f8f239373c0f2e5e8f92feea2df 57631054fae6dcc9c892ae6310b58bbb6f6e5048 < a3af84b0fa00ead01fcd0e28b5d773ff25990a0d
Linux / Linux
5.18
References
git.kernel.org: https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35 git.kernel.org: https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37 git.kernel.org: https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 git.kernel.org: https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df git.kernel.org: https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d