{"api_version":"1","generated_at":"2026-08-05T09:18:01+00:00","cve":"CVE-2026-64507","urls":{"html":"https://cve.report/CVE-2026-64507","api":"https://cve.report/api/cve/CVE-2026-64507.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64507","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64507"},"summary":{"title":"x86/bugs: Enable IBPB flush on BPF JIT allocation","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:36","updated_at":"2026-07-27 05:16:55"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1","name":"https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d","name":"https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35","name":"https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df","name":"https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37","name":"https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64507","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64507","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 cb27f3bf915cc0f20fc0c48da9059304e39ebd35 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 9354248fc1c33a844ca1872761f6668b393e8c37 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 52440e15d9628f8f239373c0f2e5e8f92feea2df git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 57631054fae6dcc9c892ae6310b58bbb6f6e5048 a3af84b0fa00ead01fcd0e28b5d773ff25990a0d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64507","cve":"CVE-2026-64507","epss":"0.001570000","percentile":"0.053070000","score_date":"2026-07-29","updated_at":"2026-07-30 00:09:16"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/include/asm/nospec-branch.h","arch/x86/kernel/cpu/bugs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cb27f3bf915cc0f20fc0c48da9059304e39ebd35","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"9354248fc1c33a844ca1872761f6668b393e8c37","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"52440e15d9628f8f239373c0f2e5e8f92feea2df","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"a3af84b0fa00ead01fcd0e28b5d773ff25990a0d","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/include/asm/nospec-branch.h","arch/x86/kernel/cpu/bugs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc2","versionStartIncluding":"5.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-07-27T04:37:45.561Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35"},{"url":"https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37"},{"url":"https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1"},{"url":"https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df"},{"url":"https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d"}],"title":"x86/bugs: Enable IBPB flush on BPF JIT allocation","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64507","datePublished":"2026-07-25T08:52:01.008Z","dateReserved":"2026-07-19T15:36:31.793Z","dateUpdated":"2026-07-27T04:37:45.561Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:36","lastModifiedDate":"2026-07-27 05:16:55","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64507","Ordinal":"1","Title":"x86/bugs: Enable IBPB flush on BPF JIT allocation","CVE":"CVE-2026-64507","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64507","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"x86/bugs: Enable IBPB flush on BPF JIT allocation"}]}}}