{"schema":"threatline.record/2","record":{"id":"CVE-2026-98752","aliases":[],"summary":"tty: port: fix tty_port_tty_vhangup() race","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: port: fix tty_port_tty_vhangup() race\n\nDrivers rely on tty_port_tty_vhangup() to synchronously hang up their\nports before tearing down resources as part of deregistration (e.g. on\nphysical disconnect).\n\nIf tty_port_tty_vhangup() races with another hangup it may however\nreturn before the port has been shut down. This is in turn can lead to\nuse-after-free and NULL-pointer dereferences in racing ioctls (including\na synchronous hangup) and in processing of racing asynchronous hangups\n(carrier loss).\n\nAdd the missing serialisation to tty_port_tty_vhangup() and\ntty_port_hangup() so that the former does not return until the port has\nbeen shut down also when there is a racing hangup.\n\nNote that serial core does not use tty_port_hangup(), but it already\nholds the port mutex when clearing port->tty and shutting down the port\nin uart_hangup().","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98752","source_modified_at":"2026-10-21T12:56:27.804Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"7ca0ff9ab3218ec443a7a9ad247e4650373ed41e","lessThan":"ce220b4cdf62f73db0c1940f968eb33b9899fdd0","status":"affected","versionType":"git"},{"version":"7ca0ff9ab3218ec443a7a9ad247e4650373ed41e","lessThan":"6d1a984afc3ca477dab3e51ec806671d443ad524","status":"affected","versionType":"git"},{"version":"7ca0ff9ab3218ec443a7a9ad247e4650373ed41e","lessThan":"6b7be3b9b857947e9c1338d4919d4ebd3b75e907","status":"affected","versionType":"git"},{"version":"7ca0ff9ab3218ec443a7a9ad247e4650373ed41e","lessThan":"017b18addbe8dcace1a569a00d40ed1ba1e03f4c","status":"affected","versionType":"git"},{"version":"7ca0ff9ab3218ec443a7a9ad247e4650373ed41e","lessThan":"b48820de8c1a596c5b99775524dfce73c6576c5d","status":"affected","versionType":"git"},{"version":"4260dc792fabfd20c8644fa9414b2ae48372365f","status":"affected","versionType":"git"},{"version":"2.6.31.2","lessThan":"2.6.32","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98752","source_modified_at":"2026-10-21T12:56:27.804Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.32","status":"affected"},{"version":"0","lessThan":"2.6.32","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98752","source_modified_at":"2026-10-21T12:56:27.804Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6d1a984afc3ca477dab3e51ec806671d443ad524","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98752","source_modified_at":"2026-10-21T12:56:27.804Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6b7be3b9b857947e9c1338d4919d4ebd3b75e907","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98752","source_modified_at":"2026-10-21T12:56:27.804Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"017b18addbe8dcace1a569a00d40ed1ba1e03f4c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98752","source_modified_at":"2026-10-21T12:56:27.804Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2.6.32","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05726,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:47:36.877Z","modified_at":"2026-10-21T12:56:27.804Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98752","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:56:27.804Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98752","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/ce220b4cdf62f73db0c1940f968eb33b9899fdd0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6d1a984afc3ca477dab3e51ec806671d443ad524"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6b7be3b9b857947e9c1338d4919d4ebd3b75e907"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/017b18addbe8dcace1a569a00d40ed1ba1e03f4c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b48820de8c1a596c5b99775524dfce73c6576c5d"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:56:27.804Z","content_hash":"160d57974312626f5eda1fdcf7faf051f0ecbc7c56cc20599e7218034bbfa1c5"}}