{"id":"CVE-2026-89769","aliases":[],"url":"https://o3.security/vulnerability/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.","published":"2026-09-11T19:47:08.870Z","modified":"2026-09-14T03:46:29.544038998Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.18.50"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-14T03:46:29.544038998Z"}}