{"id":"CVE-2026-99167","revision":"e1adb8055b224527a723668dfde4489e","records":[{"revision":"e1adb8055b224527a723668dfde4489e","observedAt":"2026-10-31T13:33:50.447+00:00","statement":{"source":"cve-program","id":"CVE-2026-99167","aliases":[],"title":"net/sched: fix use-after-free in __tcf_action_put()","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.","state":0,"publishedAt":"2026-10-28T10:35:18.85+00:00","modifiedAt":"2026-10-31T12:44:30.175+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/sched/act_api.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"4d83a3fc03bc595dd39b79ad61288738fbb1f2ba\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"fd01abed2568209f7daaf60e5ee68ae4a4744f48\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"fcc7d734ceccfab8ec3398c5b34f8e775d459507\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"fde33eb9955d819af282d5f5e84684eaec248291\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"969ad6f2b266f383b44194d50d15631969b26222\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"2465d27ef90de9105c2bffb6c35f8ce08918e642\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"2e012e431aa271ef3c84206f48854f539c03bff0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"16af6067392c40e454e49eec834843ab03643d96\",\n                            \"lessThan\": \"7b16eb911091aae237a8673da94e4dfb9cd21d54\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/sched/act_api.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.273\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.224\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.191\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.161\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.115\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.59\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.13\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/4d83a3fc03bc595dd39b79ad61288738fbb1f2ba","https://git.kernel.org/stable/c/fd01abed2568209f7daaf60e5ee68ae4a4744f48","https://git.kernel.org/stable/c/fcc7d734ceccfab8ec3398c5b34f8e775d459507","https://git.kernel.org/stable/c/fde33eb9955d819af282d5f5e84684eaec248291","https://git.kernel.org/stable/c/969ad6f2b266f383b44194d50d15631969b26222","https://git.kernel.org/stable/c/2465d27ef90de9105c2bffb6c35f8ce08918e642","https://git.kernel.org/stable/c/2e012e431aa271ef3c84206f48854f539c03bff0","https://git.kernel.org/stable/c/7b16eb911091aae237a8673da94e4dfb9cd21d54"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99167","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99167","identifiers":["CVE-2026-99167"]},"retained":false,"historicalAffected":[]}],"coverage":[]}