{"id":"CVE-2024-53057","revision":"88cfd6b70c5c43a590b684fe417242e7","records":[{"revision":"88cfd6b70c5c43a590b684fe417242e7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-53057","aliases":[],"title":"net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT\n\nIn qdisc_tree_reduce_backlog, Qdiscs with major handle ffff: are assumed\nto be either root or ingress. This assumption is bogus since it's valid\nto create egress qdiscs with major handle ffff:\nBudimir Markovic found that for qdiscs like DRR that maintain an active\nclass list, it will cause a UAF with a dangling class pointer.\n\nIn 066a3b5b2346, the concern was to avoid iterating over the ingress\nqdisc since its parent is itself. The proper fix is to stop when parent\nTC_H_ROOT is reached because the only way to retrieve ingress is when a\nhierarchy which does not contain a ffff: major handle call into\nqdisc_lookup with TC_H_MAJ(TC_H_ROOT).\n\nIn the scenario where major ffff: is an egress qdisc in any of the tree\nlevels, the updates will also propagate to TC_H_ROOT, which then the\niteration must stop.\n\n\n net/sched/sch_api.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","state":0,"publishedAt":"2024-11-19T17:19:40.284+00:00","modifiedAt":"2026-10-15T00:58:34.25+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_api.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"e7f9a6f97eb067599a74f3bcb6761976b0ed303e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"ce691c814bc7a3c30c220ffb5b7422715458fd9b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"05df1b1dff8f197f1c275b57ccb2ca33021df552\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"580b3189c1972aff0f993837567d36392e9d981b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"597cf9748c3477bf61bc35f0634129f56764ad24\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"9995909615c3431a5304c1210face5f268d24dba\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\",\n                            \"lessThan\": \"2e95c4384438adeaa772caa560244b1a2efef816\",\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_api.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.25\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.25\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.19.323\",\n                            \"lessThanOrEqual\": \"4.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.285\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.229\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.171\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.116\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.60\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.11.7\",\n                            \"lessThanOrEqual\": \"6.11.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12\",\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/e7f9a6f97eb067599a74f3bcb6761976b0ed303e","https://git.kernel.org/stable/c/dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20","https://git.kernel.org/stable/c/ce691c814bc7a3c30c220ffb5b7422715458fd9b","https://git.kernel.org/stable/c/05df1b1dff8f197f1c275b57ccb2ca33021df552","https://git.kernel.org/stable/c/580b3189c1972aff0f993837567d36392e9d981b","https://git.kernel.org/stable/c/597cf9748c3477bf61bc35f0634129f56764ad24","https://git.kernel.org/stable/c/9995909615c3431a5304c1210face5f268d24dba","https://git.kernel.org/stable/c/2e95c4384438adeaa772caa560244b1a2efef816"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-53057","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-53057","identifiers":["CVE-2024-53057"]},"retained":false,"historicalAffected":[]}],"coverage":[]}