x86/bugs: Enable IBPB flush on BPF JIT allocation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64507
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:36 UTC
Updated2026-07-27 05:16:55 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001570000 probability, percentile 0.053070000 (date 2026-07-29)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 cb27f3bf915cc0f20fc0c48da9059304e39ebd35 git Not specified
CNA Linux Linux affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 9354248fc1c33a844ca1872761f6668b393e8c37 git Not specified
CNA Linux Linux affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 git Not specified
CNA Linux Linux affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 52440e15d9628f8f239373c0f2e5e8f92feea2df git Not specified
CNA Linux Linux affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 a3af84b0fa00ead01fcd0e28b5d773ff25990a0d git Not specified
CNA Linux Linux affected 5.18 Not specified
CNA Linux Linux unaffected 5.18 semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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