{"id":"CVE-2025-38108","revision":"861c16f9838b46249c7461ca8925f9e9","records":[{"revision":"861c16f9838b46249c7461ca8925f9e9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38108","aliases":[],"title":"net_sched: red: fix a race in __red_change()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: red: fix a race in __red_change()\n\nGerrard Tai reported a race condition in RED, 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":"2025-07-03T08:35:18.523+00:00","modifiedAt":"2026-10-15T21:52:08.492+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_red.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"2790c4ec481be45a80948d059cd7c9a06bc37493\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"a1bf6a4e9264a685b0e642994031f9c5aad72414\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"110a47efcf23438ff8d31dbd9c854fae2a48bf98\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"f569984417a4e12c67366e69bdcb752970de921d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"2a71924ca4af59ffc00f0444732b6cd54b153d0e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"4b755305b2b0618e857fdadb499365b5f2e478d1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"444ad445df5496a785705019268a8a84b84484bb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0c8d13ac96070000da33f394f45e9c19638483c5\",\n                            \"lessThan\": \"85a3e0ede38450ea3053b8c45d28cf55208409b8\",\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_red.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/2790c4ec481be45a80948d059cd7c9a06bc37493","https://git.kernel.org/stable/c/a1bf6a4e9264a685b0e642994031f9c5aad72414","https://git.kernel.org/stable/c/110a47efcf23438ff8d31dbd9c854fae2a48bf98","https://git.kernel.org/stable/c/f569984417a4e12c67366e69bdcb752970de921d","https://git.kernel.org/stable/c/2a71924ca4af59ffc00f0444732b6cd54b153d0e","https://git.kernel.org/stable/c/4b755305b2b0618e857fdadb499365b5f2e478d1","https://git.kernel.org/stable/c/444ad445df5496a785705019268a8a84b84484bb","https://git.kernel.org/stable/c/85a3e0ede38450ea3053b8c45d28cf55208409b8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38108","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38108","identifiers":["CVE-2025-38108"]},"retained":false,"historicalAffected":[]}],"coverage":[]}