{"id":"CVE-2026-23105","revision":"527d58a6170e401288f28983baf84701","records":[{"revision":"527d58a6170e401288f28983baf84701","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23105","aliases":[],"title":"net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag\n\nThis is more of a preventive patch to make the code more consistent and\nto prevent possible exploits that employ child qlen manipulations on qfq.\nuse cl_is_active instead of relying on the child qdisc's qlen to determine\nclass activation.","state":0,"publishedAt":"2026-02-04T16:08:26.376+00:00","modifiedAt":"2026-10-19T18:25:31.225+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_qfq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"fac2c67bb2bb732eae4283e45fc338af7e08c254\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"b8c24cf5268fb3bfb8d16324c3dbb985f698c835\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"f27047abf7cac1b6f90c3ad60de21ef9f717c26d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"93b8635974fb050c43d07e35e5edfe6e685ca28a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"abd9fc26ea577561a5ef6241a1b058755ffdad0c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"77f1afd0bb4d5da95236f6114e6d0dfcde187ff6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"d837fbee92453fbb829f950c8e7cf76207d73f33\",\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_qfq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.249\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.199\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.162\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.122\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.68\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.8\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19\",\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/fac2c67bb2bb732eae4283e45fc338af7e08c254","https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835","https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d","https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a","https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c","https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6","https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23105","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23105","identifiers":["CVE-2026-23105"]},"retained":false,"historicalAffected":[]}],"coverage":[]}