{"id":"CVE-2021-47355","details":"In the Linux kernel, the following vulnerability has been resolved:\n\natm: nicstar: Fix possible use-after-free in nicstar_cleanup()\n\nThis module's remove path calls del_timer(). However, that function\ndoes not wait until the timer handler finishes. This means that the\ntimer handler may still be running after the driver's remove function\nhas finished, which would result in a use-after-free.\n\nFix by calling del_timer_sync(), which makes sure the timer handler\nhas finished, and unable to re-schedule itself.","modified":"2026-03-13T05:18:06.316526Z","published":"2024-05-21T15:15:21.840Z","related":["SUSE-SU-2024:1979-1","SUSE-SU-2024:1983-1","SUSE-SU-2024:2184-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/a7a7b2848312cc4c3a42b6e42a8ab2e441857aba"},{"type":"FIX","url":"https://git.kernel.org/stable/c/bdf5334250c69fabf555b7322c75249ea7d5f148"},{"type":"FIX","url":"https://git.kernel.org/stable/c/2f958b6f6ba0854b39be748d21dfe71e0fe6580f"},{"type":"FIX","url":"https://git.kernel.org/stable/c/5b991df8881088448cb223e769e37cab8dd40706"},{"type":"FIX","url":"https://git.kernel.org/stable/c/99779c9d9ffc7775da6f7fd8a7c93ac61657bed5"},{"type":"FIX","url":"https://git.kernel.org/stable/c/a7f7c42e31157d1f0871d6a8e1a0b73a6b4ea785"},{"type":"FIX","url":"https://git.kernel.org/stable/c/c471569632654e57c83512e0fc1ba0dbb4544ad6"},{"type":"FIX","url":"https://git.kernel.org/stable/c/34e7434ba4e97f4b85c1423a59b2922ba7dff2ea"},{"type":"FIX","url":"https://git.kernel.org/stable/c/4e2a0848ea2cab0716d46f85a8ccd5fa9a493e51"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47355.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.4.276"}]},{"events":[{"introduced":"4.5"},{"fixed":"4.9.276"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.240"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.198"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.133"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.51"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.12.18"}]},{"events":[{"introduced":"5.13"},{"fixed":"5.13.3"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}