{"id":"CVE-2026-53011","revision":"275f230cb7e1490bb9ad9506cd1a3db8","records":[{"revision":"275f230cb7e1490bb9ad9506cd1a3db8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53011","aliases":[],"title":"net/sched: taprio: fix use-after-free in advance_sched() on schedule switch","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: taprio: fix use-after-free in advance_sched() on schedule switch\n\nIn advance_sched(), when should_change_schedules() returns true,\nswitch_schedules() is called to promote the admin schedule to oper.\nswitch_schedules() queues the old oper schedule for RCU freeing via\ncall_rcu(), but 'next' still points into an entry of the old oper\nschedule. The subsequent 'next->end_time = end_time' and\nrcu_assign_pointer(q->current_entry, next) are use-after-free.\n\nFix this by selecting 'next' from the new oper schedule immediately\nafter switch_schedules(), and using its pre-calculated end_time.\nsetup_first_end_time() sets the first entry's end_time to\nbase_time + interval when the schedule is installed, so the value\nis already correct.\n\nThe deleted 'end_time = sched_base_time(admin)' assignment was also\nharmful independently: it would overwrite the new first entry's\npre-calculated end_time with just base_time.","state":0,"publishedAt":"2026-06-24T16:29:22.082+00:00","modifiedAt":"2026-10-19T19:47:13.86+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/sch_taprio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"a8fc396519ef4f081bc545e88f61241728bb78d7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"3471874578160a28c171a607fa069f24062634b8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"7256996e1ef553716817f3bfd077c2f3b48b582f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"eee072fe16c646190d33ae69c9983d8de1562bf8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"1bd286fa3e21200133478ed523cc6a2788baf38a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"b73235da5dde77ed1264f9767b62c28c9d71fd78\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"0e62171df8ed4804d00db088f17eed06468233fa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3d43c0d56f1b94e74963a2fbadfb70126d92213\",\n                            \"lessThan\": \"105425b1969c5affe532713cfac1c0b320d7ac2b\",\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/sch_taprio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.141\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.91\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.33\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.10\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\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/a8fc396519ef4f081bc545e88f61241728bb78d7","https://git.kernel.org/stable/c/3471874578160a28c171a607fa069f24062634b8","https://git.kernel.org/stable/c/7256996e1ef553716817f3bfd077c2f3b48b582f","https://git.kernel.org/stable/c/eee072fe16c646190d33ae69c9983d8de1562bf8","https://git.kernel.org/stable/c/1bd286fa3e21200133478ed523cc6a2788baf38a","https://git.kernel.org/stable/c/b73235da5dde77ed1264f9767b62c28c9d71fd78","https://git.kernel.org/stable/c/0e62171df8ed4804d00db088f17eed06468233fa","https://git.kernel.org/stable/c/105425b1969c5affe532713cfac1c0b320d7ac2b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53011","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53011","identifiers":["CVE-2026-53011"]},"retained":false,"historicalAffected":[]}],"coverage":[]}