{"id":"CVE-2026-23354","summary":"x86/fred: Correct speculative safety in fred_extint()","details":"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.","modified":"2026-04-02T13:12:22.666645Z","published":"2026-03-25T10:27:38.825Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23354.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643"},{"type":"WEB","url":"https://git.kernel.org/stable/c/92caa5274b99cb6729177232a029ce0dfa6c5f7b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aa280a08e7d8fae58557acc345b36b3dc329d595"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e58f1a9b0677de24dcfee0b21393446ec92ff120"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23354.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23354"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"14619d912b658ecd9573fb88400d3830a29cadcb"},{"fixed":"3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643"},{"fixed":"e58f1a9b0677de24dcfee0b21393446ec92ff120"},{"fixed":"92caa5274b99cb6729177232a029ce0dfa6c5f7b"},{"fixed":"aa280a08e7d8fae58557acc345b36b3dc329d595"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23354.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.77"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.17"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23354.json"}}],"schema_version":"1.7.5"}