{"id":"CVE-2026-64507","summary":"x86/bugs: Enable IBPB flush on BPF JIT allocation","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/bugs: Enable IBPB flush on BPF JIT allocation\n\nEnable hardening against JIT spraying when Spectre-v2 mitigations are in\nuse. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip\nenabling the IBPB flush if the BPF dispatcher is already using a retpoline\nsequence.\n\nThis hardening applies only when BPF-JIT is in use. Guard the enabling\nunder CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n.","modified":"2026-07-28T04:03:08.650191420Z","published":"2026-07-25T08:52:01.008Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64507.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64507.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64507"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"57631054fae6dcc9c892ae6310b58bbb6f6e5048"},{"fixed":"cb27f3bf915cc0f20fc0c48da9059304e39ebd35"},{"fixed":"9354248fc1c33a844ca1872761f6668b393e8c37"},{"fixed":"8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1"},{"fixed":"52440e15d9628f8f239373c0f2e5e8f92feea2df"},{"fixed":"a3af84b0fa00ead01fcd0e28b5d773ff25990a0d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64507.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.18.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64507.json"}}],"schema_version":"1.7.5"}