{"id":"CVE-2025-37914","revision":"26569a2225cf45519bb34a5242692ef6","records":[{"revision":"26569a2225cf45519bb34a5242692ef6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-37914","aliases":[],"title":"net_sched: ets: Fix double list add in class with netem as child qdisc","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: ets: Fix double list add in class with netem as child qdisc\n\nAs described in Gerrard's report [1], there are use cases where a netem\nchild qdisc will make the parent qdisc's enqueue callback reentrant.\nIn the case of ets, there won't be a UAF, but the code will add the same\nclassifier to the list twice, which will cause memory corruption.\n\nIn addition to checking for qlen being zero, this patch checks whether\nthe class was already added to the active_list (cl_is_active) before\ndoing the addition to cater for the reentrant case.\n\n[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/","state":0,"publishedAt":"2025-05-20T15:21:45.796+00:00","modifiedAt":"2026-10-15T21:52:03.184+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_ets.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"554acc5a2ea9703e08023eb9a003f9e5a830a502\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"1f01e9f961605eb397c6ecd1d7b0233dfbf9077c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"bc321f714de693aae06e3786f88df2975376d996\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"1a6d0c00fa07972384b0c308c72db091d49988b6\",\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_ets.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.238\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.182\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.138\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.90\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.28\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.14.6\",\n                            \"lessThanOrEqual\": \"6.14.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15\",\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/24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea","https://git.kernel.org/stable/c/554acc5a2ea9703e08023eb9a003f9e5a830a502","https://git.kernel.org/stable/c/9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990","https://git.kernel.org/stable/c/72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3","https://git.kernel.org/stable/c/1f01e9f961605eb397c6ecd1d7b0233dfbf9077c","https://git.kernel.org/stable/c/bc321f714de693aae06e3786f88df2975376d996","https://git.kernel.org/stable/c/1a6d0c00fa07972384b0c308c72db091d49988b6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-37914","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-37914","identifiers":["CVE-2025-37914"]},"retained":false,"historicalAffected":[]}],"coverage":[]}