{"id":"CVE-2021-46905","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hso: fix NULL-deref on disconnect regression\n\nCommit 8a12f8836145 (\"net: hso: fix null-ptr-deref during tty device\nunregistration\") fixed the racy minor allocation reported by syzbot, but\nintroduced an unconditional NULL-pointer dereference on every disconnect\ninstead.\n\nSpecifically, the serial device table must no longer be accessed after\nthe minor has been released by hso_serial_tty_unregister().","modified":"2026-05-04T08:38:52.304620Z","published":"2024-02-26T16:27:45.367Z","withdrawn":"2026-05-04T08:38:52.304620Z","related":["SUSE-SU-2024:0856-1","SUSE-SU-2024:0857-1","SUSE-SU-2024:0926-1","SUSE-SU-2024:1643-1","SUSE-SU-2024:1646-1","SUSE-SU-2024:1669-1","SUSE-SU-2024:1870-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00"},{"type":"FIX","url":"https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1"},{"type":"FIX","url":"https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3"},{"type":"FIX","url":"https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725"},{"type":"FIX","url":"https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273"},{"type":"FIX","url":"https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e"},{"type":"FIX","url":"https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570e"},{"type":"FIX","url":"https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19ef"},{"type":"FIX","url":"https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46905.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.19.189"}]},{"events":[{"introduced":"4.20.0"},{"fixed":"5.4.115"}]},{"events":[{"introduced":"5.5.0"},{"fixed":"5.10.33"}]},{"events":[{"introduced":"5.11.0"},{"fixed":"5.11.17"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-NA"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-rc4"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-rc5"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-rc6"}]},{"events":[{"introduced":"0"},{"last_affected":"5.12-rc7"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}