{"id":"CVE-2025-38083","revision":"ade366e387b94e9abbba5014ae75c56b","records":[{"revision":"ade366e387b94e9abbba5014ae75c56b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38083","aliases":[],"title":"net_sched: prio: fix a race in prio_tune()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: prio: fix a race in prio_tune()\n\nGerrard Tai reported a race condition in PRIO, whenever SFQ perturb timer\nfires at the wrong time.\n\nThe race is as follows:\n\nCPU 0                                 CPU 1\n[1]: lock root\n[2]: qdisc_tree_flush_backlog()\n[3]: unlock root\n |\n |                                    [5]: lock root\n |                                    [6]: rehash\n |                                    [7]: qdisc_tree_reduce_backlog()\n |\n[4]: qdisc_put()\n\nThis can be abused to underflow a parent's qlen.\n\nCalling qdisc_purge_queue() instead of qdisc_tree_flush_backlog()\nshould fix the race, because all packets will be purged from the qdisc\nbefore releasing the lock.","state":0,"publishedAt":"2025-06-20T11:21:51.554+00:00","modifiedAt":"2026-10-15T21:52:07.502+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_prio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"53d11560e957d53ee87a0653d258038ce12361b7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"4483d8b9127591c60c4eb789d6cab953bc4522a9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"46c15c9d0f65c9ba857d63f53264f4b17e8a715f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"e3f6745006dc9423d2b065b90f191cfa11b1b584\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"93f9eeb678d4c9c1abf720b3615fa8299a490845\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b8e0b6e659983154c8d7e756cdb833d89a3d4d7\",\n                            \"lessThan\": \"d35acc1be3480505b5931f17e4ea9b7617fea4d3\",\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_prio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.295\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.239\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.186\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.142\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.94\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.34\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15.3\",\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/53d11560e957d53ee87a0653d258038ce12361b7","https://git.kernel.org/stable/c/4483d8b9127591c60c4eb789d6cab953bc4522a9","https://git.kernel.org/stable/c/20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8f","https://git.kernel.org/stable/c/3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4","https://git.kernel.org/stable/c/46c15c9d0f65c9ba857d63f53264f4b17e8a715f","https://git.kernel.org/stable/c/e3f6745006dc9423d2b065b90f191cfa11b1b584","https://git.kernel.org/stable/c/93f9eeb678d4c9c1abf720b3615fa8299a490845","https://git.kernel.org/stable/c/d35acc1be3480505b5931f17e4ea9b7617fea4d3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38083","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38083","identifiers":["CVE-2025-38083"]},"retained":false,"historicalAffected":[]}],"coverage":[]}