{"id":"CVE-2025-38477","revision":"7bf53ec7b618433783112ffee3733f72","records":[{"revision":"7bf53ec7b618433783112ffee3733f72","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38477","aliases":[],"title":"net/sched: sch_qfq: Fix race condition on qfq_aggregate","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_qfq: Fix race condition on qfq_aggregate\n\nA race condition can occur when 'agg' is modified in qfq_change_agg\n(called during qfq_enqueue) while other threads access it\nconcurrently. For example, qfq_dump_class may trigger a NULL\ndereference, and qfq_delete_class may cause a use-after-free.\n\nThis patch addresses the issue by:\n\n1. Moved qfq_destroy_class into the critical section.\n\n2. Added sch_tree_lock protection to qfq_dump_class and\nqfq_dump_class_stats.","state":0,"publishedAt":"2025-07-28T11:21:38.319+00:00","modifiedAt":"2026-10-15T01:07:26.004+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\": \"aa7a22c4d678bf649fd3a1d27debec583563414d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"d841aa5518508ab195b6781ad0d73ee378d713dd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"c6df794000147a3a02f79984aada4ce83f8d0a1e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"466e10194ab81caa2ee6a332d33ba16bcceeeba6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"fbe48f06e64134dfeafa89ad23387f66ebca3527\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"a6d735100f602c830c16d69fb6d780eebd8c9ae1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"c000a3a330d97f6c073ace5aa5faf94b9adb4b79\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"462dbc9101acd38e92eda93c0726857517a24bbd\",\n                            \"lessThan\": \"5e28d5a3f774f118896aec17a3a20a9c5c9dfc64\",\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\": \"5.4.297\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.241\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.190\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.147\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.100\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.40\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15.8\",\n                            \"lessThanOrEqual\": \"6.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.16\",\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/aa7a22c4d678bf649fd3a1d27debec583563414d","https://git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd","https://git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e","https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6","https://git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527","https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1","https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79","https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38477","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38477","identifiers":["CVE-2025-38477"]},"retained":false,"historicalAffected":[]}],"coverage":[]}