{"id":"CVE-2026-23354","state":"PUBLISHED","title":"x86/fred: Correct speculative safety in fred_extint()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/fred: Correct speculative safety in fred_extint()\n\narray_index_nospec() is no use if the result gets spilled to the stack, as\nit makes the believed safe-under-speculation value subject to memory\npredictions.\n\nFor all practical purposes, this means array_index_nospec() must be used in\nthe expression that accesses the array.\n\nAs the code currently stands, it's the wrong side of irqentry_enter(), and\n'index' is put into %ebp across the function call.\n\nRemove the index variable and reposition array_index_nospec(), so it's\ncalculated immediately before the array access.","publishedAt":"2026-03-25T10:27:38.825Z","updatedAt":"2026-05-11T22:05:14.621Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643","versionType":"git"},{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"e58f1a9b0677de24dcfee0b21393446ec92ff120","versionType":"git"},{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"92caa5274b99cb6729177232a029ce0dfa6c5f7b","versionType":"git"},{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"aa280a08e7d8fae58557acc345b36b3dc329d595","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/entry/entry_fred.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.77","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.17","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.7","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/entry/entry_fred.c"]}],"references":["https://git.kernel.org/stable/c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643","https://git.kernel.org/stable/c/e58f1a9b0677de24dcfee0b21393446ec92ff120","https://git.kernel.org/stable/c/92caa5274b99cb6729177232a029ce0dfa6c5f7b","https://git.kernel.org/stable/c/aa280a08e7d8fae58557acc345b36b3dc329d595"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23354.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23354","state":"PUBLISHED","datePublished":"2026-03-25T10:27:38.825Z","dateUpdated":"2026-05-11T22:05:14.621Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:46.000Z"},"containers":{"cna":{"title":"x86/fred: Correct speculative safety in fred_extint()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/fred: Correct speculative safety in fred_extint()\n\narray_index_nospec() is no use if the result gets spilled to the stack, as\nit makes the believed safe-under-speculation value subject to memory\npredictions.\n\nFor all practical purposes, this means array_index_nospec() must be used in\nthe expression that accesses the array.\n\nAs the code currently stands, it's the wrong side of irqentry_enter(), and\n'index' is put into %ebp across the function call.\n\nRemove the index variable and reposition array_index_nospec(), so it's\ncalculated immediately before the array access."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643","versionType":"git"},{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"e58f1a9b0677de24dcfee0b21393446ec92ff120","versionType":"git"},{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"92caa5274b99cb6729177232a029ce0dfa6c5f7b","versionType":"git"},{"version":"14619d912b658ecd9573fb88400d3830a29cadcb","status":"affected","lessThan":"aa280a08e7d8fae58557acc345b36b3dc329d595","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/entry/entry_fred.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.77","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.17","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.7","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/entry/entry_fred.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643"},{"url":"https://git.kernel.org/stable/c/e58f1a9b0677de24dcfee0b21393446ec92ff120"},{"url":"https://git.kernel.org/stable/c/92caa5274b99cb6729177232a029ce0dfa6c5f7b"},{"url":"https://git.kernel.org/stable/c/aa280a08e7d8fae58557acc345b36b3dc329d595"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:05:14.621Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.19.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}