{"id":"CVE-2026-99167","aliases":[],"title":"net/sched: fix use-after-free in __tcf_action_put()","titleSource":"Linux","descriptionSource":"Linux","products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"16af6067392c40e454e49eec834843ab03643d96","status":"affected","lessThan":"2465d27ef90de9105c2bffb6c35f8ce08918e642","versionType":"git"},{"version":"16af6067392c40e454e49eec834843ab03643d96","status":"affected","lessThan":"2e012e431aa271ef3c84206f48854f539c03bff0","versionType":"git"},{"version":"16af6067392c40e454e49eec834843ab03643d96","status":"affected","lessThan":"7b16eb911091aae237a8673da94e4dfb9cd21d54","versionType":"git"}],"defaultStatus":"unaffected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99167"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99167"}],"remediation":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fix use-after-free in __tcf_action_put()\n\n__tcf_action_put() decrements the reference count before decrementing the\nbinding count. Another thread can free the action between these operations,\ncausing the binding-count update to access freed memory. KASAN reports it\nas:\n\n  BUG: KASAN: slab-use-after-free in __tcf_action_put+0x327/0x340\n  Write of size 4 at addr ff11000000d46420 by task tc-put-pause/64\n\nHold the action IDR mutex across both counter updates and IDR removal,\nkeeping cleanup outside the lock.","severity":"unknown","score":null,"published":"2026-10-28T10:35:18.850Z","modified":"2026-10-28T10:35:18.850Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://git.kernel.org/stable/c/2465d27ef90de9105c2bffb6c35f8ce08918e642","https://git.kernel.org/stable/c/2e012e431aa271ef3c84206f48854f539c03bff0","https://git.kernel.org/stable/c/7b16eb911091aae237a8673da94e4dfb9cd21d54"],"sources":[{"name":"CVE","id":"CVE-2026-99167","modified":"2026-10-28T10:35:18.850Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99167"}],"assessments":[],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T01:25:32.580Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}