{"id":"CVE-2026-98753","summary":"tty: tty_port: restore TTY_IO_ERROR on activation failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: tty_port: restore TTY_IO_ERROR on activation failure\n\nMake sure to restore the TTY_IO_ERROR flag if activation fails to\nprevent I/O attempts on a port that is gone or powered down.\n\nThis specifically avoids issues like kernel panic due to unclocked\naccesses or NULL-pointer dereferences when accessing powered down or\nderegistered ports when a TTY ioctl races with hangup and open.\n\nNote that the flag is set again in tty_port_close() but not restoring it\non activation failure leaves a window where drivers fail to handle the\nioctl-hangup race.","modified":"2026-10-19T02:47:15.749962476Z","published":"2026-10-18T15:47:37.700Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98753.json"},"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/34d4f67472ef7a744970b772a8565ddc727788e2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98753.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98753"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4"},{"fixed":"34d4f67472ef7a744970b772a8565ddc727788e2"},{"fixed":"7021acc84c2e0add77a1a33152e3a1e428fdbfdb"},{"fixed":"6388409b711eb91b14fa075a4d861ccc4df1cfe7"},{"fixed":"56964f6a31238fb41d5830bb42520c5b10ff7d8f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98753.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.33"},{"fixed":"6.12.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.56"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98753.json"}}],"schema_version":"1.9.0"}