{"id":"CVE-2026-89769","summary":"clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path\n\nWhen cpuhp_setup_state fails after pit_clockevent_per_cpu_init has\nsuccessfully called request_irq, the error handling jumps directly to\nout_pit_clocksource_unregister without freeing the registered IRQ.\n\nThis leaks the IRQ line and, since kfree(pit) follows, leaves a\ndangling pointer registered as the interrupt handler's dev_id,\npotentially leading to a use-after-free if the IRQ fires afterwards.\n\nFix it by calling pit_clockevent_per_cpu_exit to properly release the\nIRQ before falling through to the existing cleanup chain.","modified":"2026-09-13T03:47:20.774605561Z","published":"2026-09-11T19:47:08.870Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89769.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/05520e035f8332c8e33f3011b5ca016fde61793d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cdcd861123248e871c2ec2be968b0a1b2a5a34b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d53c29a89a15e56a1797f3ef249955e544782e04"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89769.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89769"},{"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":"bee33f22d7c30626e711b4900e3f460b6e0e104f"},{"fixed":"d53c29a89a15e56a1797f3ef249955e544782e04"},{"fixed":"cdcd861123248e871c2ec2be968b0a1b2a5a34b0"},{"fixed":"05520e035f8332c8e33f3011b5ca016fde61793d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89769.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89769.json"}}],"schema_version":"1.9.0"}