{"id":"CVE-2026-80991","summary":"net: ravb: serialize PTP clock teardown","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: serialize PTP clock teardown\n\nravb_ptp_interrupt() can race with ravb_ptp_stop() and pass the clock to\nptp_clock_event() while ptp_clock_unregister() is freeing it. This can\nlead to a use-after-free.\n\nUse READ_ONCE() and WRITE_ONCE() for lockless access to the clock pointer.\nAtomically detach it with xchg() before disabling PTP interrupts, then\nsynchronize all IRQs which can invoke ravb_ptp_interrupt() before\nunregistering the detached clock.\n\nA handler which read the old pointer completes before the clock is\nunregistered, while later handlers read NULL and skip the event.","modified":"2026-09-13T03:47:10.756057185Z","published":"2026-09-11T19:42:48.187Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80991.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1cb9663789c5b7a12fcd419fcca6d6254c398252"},{"type":"WEB","url":"https://git.kernel.org/stable/c/66b50c31419e7946e9aa325a468ad9b64c961a25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67a82e6f886beed0de8f8da08bb767e68fba952d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/695acb5534a9e366efb47b40c7487fc56488b09b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80991.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80991"},{"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":"a0d2f20650e81407d8e51ad2cbdc492861c74e9c"},{"fixed":"695acb5534a9e366efb47b40c7487fc56488b09b"},{"fixed":"67a82e6f886beed0de8f8da08bb767e68fba952d"},{"fixed":"66b50c31419e7946e9aa325a468ad9b64c961a25"},{"fixed":"1cb9663789c5b7a12fcd419fcca6d6254c398252"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80991.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"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-2026-80991.json"}}],"schema_version":"1.9.0"}