{"id":"CVE-2026-90432","summary":"sched_ext: Abort directly from the hardlockup handler","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Abort directly from the hardlockup handler\n\nscx_hardlockup() defers the abort to an irq_work because exit claiming used\nto take scx_sched_lock and couldn't run from NMI. The deferral is now\nunnecessary - claiming is NMI-safe and asserting -\u003eaborting is exactly what\nbreaks the live-locks that hard-lock CPUs. Call handle_lockup() directly and\ndrop the irq_work. This also makes the self-detected case recoverable: the\nperf watchdog fires on the hard-locked CPU itself, where a queued irq_work\nnever runs with IRQs off.\n\nAlso fix the return value: %true used to be returned whenever sched_ext was\nloaded, suppressing the kernel's hardlockup report even when the abort was\nrefused. Return %true only when this call initiated the abort.","modified":"2026-09-19T03:47:26.225905407Z","published":"2026-09-17T16:09:52.429Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90432.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3c4b38064937a761ebbf85b1649e812db85eb59e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4d6270bbb4e083a4d2d39f3c36f30f5c939c06ed"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90432.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90432"},{"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":"bd2d76455b65aab77652823919db128a8e585825"},{"fixed":"4d6270bbb4e083a4d2d39f3c36f30f5c939c06ed"},{"fixed":"3c4b38064937a761ebbf85b1649e812db85eb59e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90432.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.1.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90432.json"}}],"schema_version":"1.9.0"}