{"id":"CVE-2025-21692","revision":null,"records":[{"revision":"3dbe91a3ef4d4311a517448ed6af1eed","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21692","aliases":[],"title":"net: sched: fix ets qdisc OOB Indexing","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix ets qdisc OOB Indexing\n\nHaowei Yan <g1042620637@gmail.com> found that ets_class_from_arg() can\nindex an Out-Of-Bound class in ets_class_from_arg() when passed clid of\n0. The overflow may cause local privilege escalation.\n\n [   18.852298] ------------[ cut here ]------------\n [   18.853271] UBSAN: array-index-out-of-bounds in net/sched/sch_ets.c:93:20\n [   18.853743] index 18446744073709551615 is out of range for type 'ets_class [16]'\n [   18.854254] CPU: 0 UID: 0 PID: 1275 Comm: poc Not tainted 6.12.6-dirty #17\n [   18.854821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n [   18.856532] Call Trace:\n [   18.857441]  <TASK>\n [   18.858227]  dump_stack_lvl+0xc2/0xf0\n [   18.859607]  dump_stack+0x10/0x20\n [   18.860908]  __ubsan_handle_out_of_bounds+0xa7/0xf0\n [   18.864022]  ets_class_change+0x3d6/0x3f0\n [   18.864322]  tc_ctl_tclass+0x251/0x910\n [   18.864587]  ? lock_acquire+0x5e/0x140\n [   18.865113]  ? __mutex_lock+0x9c/0xe70\n [   18.866009]  ? __mutex_lock+0xa34/0xe70\n [   18.866401]  rtnetlink_rcv_msg+0x170/0x6f0\n [   18.866806]  ? __lock_acquire+0x578/0xc10\n [   18.867184]  ? __pfx_rtnetlink_rcv_msg+0x10/0x10\n [   18.867503]  netlink_rcv_skb+0x59/0x110\n [   18.867776]  rtnetlink_rcv+0x15/0x30\n [   18.868159]  netlink_unicast+0x1c3/0x2b0\n [   18.868440]  netlink_sendmsg+0x239/0x4b0\n [   18.868721]  ____sys_sendmsg+0x3e2/0x410\n [   18.869012]  ___sys_sendmsg+0x88/0xe0\n [   18.869276]  ? rseq_ip_fixup+0x198/0x260\n [   18.869563]  ? rseq_update_cpu_node_id+0x10a/0x190\n [   18.869900]  ? trace_hardirqs_off+0x5a/0xd0\n [   18.870196]  ? syscall_exit_to_user_mode+0xcc/0x220\n [   18.870547]  ? do_syscall_64+0x93/0x150\n [   18.870821]  ? __memcg_slab_free_hook+0x69/0x290\n [   18.871157]  __sys_sendmsg+0x69/0xd0\n [   18.871416]  __x64_sys_sendmsg+0x1d/0x30\n [   18.871699]  x64_sys_call+0x9e2/0x2670\n [   18.871979]  do_syscall_64+0x87/0x150\n [   18.873280]  ? do_syscall_64+0x93/0x150\n [   18.874742]  ? lock_release+0x7b/0x160\n [   18.876157]  ? do_user_addr_fault+0x5ce/0x8f0\n [   18.877833]  ? irqentry_exit_to_user_mode+0xc2/0x210\n [   18.879608]  ? irqentry_exit+0x77/0xb0\n [   18.879808]  ? clear_bhb_loop+0x15/0x70\n [   18.880023]  ? clear_bhb_loop+0x15/0x70\n [   18.880223]  ? clear_bhb_loop+0x15/0x70\n [   18.880426]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n [   18.880683] RIP: 0033:0x44a957\n [   18.880851] Code: ff ff e8 fc 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 8974 24 10\n [   18.881766] RSP: 002b:00007ffcdd00fad8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\n [   18.882149] RAX: ffffffffffffffda RBX: 00007ffcdd010db8 RCX: 000000000044a957\n [   18.882507] RDX: 0000000000000000 RSI: 00007ffcdd00fb70 RDI: 0000000000000003\n [   18.885037] RBP: 00007ffcdd010bc0 R08: 000000000703c770 R09: 000000000703c7c0\n [   18.887203] R10: 0000000000000080 R11: 0000000000000246 R12: 0000000000000001\n [   18.888026] R13: 00007ffcdd010da8 R14: 00000000004ca7d0 R15: 0000000000000001\n [   18.888395]  </TASK>\n [   18.888610] ---[ end trace ]---","state":0,"publishedAt":"2025-02-10T15:58:48.087+00:00","modifiedAt":"2026-10-15T01:03:11.643+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\": \"03c56665dab1f4ac844bc156652d50d639093fa5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"bcf0d815e728a3a304b50455b32a3170c16e1eaa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"1332c6ed446be787f901ed1064ec6a3c694f028a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"f4168299e553f17aa2ba4016e77a9c38da40eb1d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"997f6ec4208b23c87daf9f044689685f091826f7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"f6b0f05fbfa4044f890e8a348288c0d9a20bd1d0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\",\n                            \"lessThan\": \"d62b04fca4340a0d468d7853bd66e511935a18cb\",\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\": \"5.10.234\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.178\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.128\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.75\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.12\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.13.1\",\n                            \"lessThanOrEqual\": \"6.13.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.14\",\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/03c56665dab1f4ac844bc156652d50d639093fa5","https://git.kernel.org/stable/c/bcf0d815e728a3a304b50455b32a3170c16e1eaa","https://git.kernel.org/stable/c/1332c6ed446be787f901ed1064ec6a3c694f028a","https://git.kernel.org/stable/c/f4168299e553f17aa2ba4016e77a9c38da40eb1d","https://git.kernel.org/stable/c/997f6ec4208b23c87daf9f044689685f091826f7","https://git.kernel.org/stable/c/f6b0f05fbfa4044f890e8a348288c0d9a20bd1d0","https://git.kernel.org/stable/c/d62b04fca4340a0d468d7853bd66e511935a18cb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21692","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21692","identifiers":["CVE-2025-21692"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T19:02:11.0282238+00:00","complete":true,"records":1772,"lastAttemptAt":"2026-11-09T19:02:11.0282238+00:00","lastSuccessAt":"2026-11-09T19:02:11.2511726+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:11.2511728+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-da82b7f3c08c0a1c809bacbfac0a567c645c18f0205247304bfc7e4ee4c02653","complete":true,"records":421491,"lastAttemptAt":"2026-11-09T19:02:10.4293016+00:00","lastSuccessAt":"2026-11-09T18:02:17.6122603+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:10.4293016+00:00","snapshotPublishedAt":"2026-11-09T17:19:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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Not a global EPSS backfill.","generation":"2026-11-09T19:02:11.0282238+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T19:02:11.0282238+00:00","lastSuccessAt":"2026-11-09T19:02:11.2551731+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:11.2551735+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-9c7aae9a77ad4fe48f16e3014ae326fa","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T19:02:43.2420437+00:00","lastSuccessAt":"2026-11-09T19:02:43.234+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:43.234+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T19:02:10.7853332+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:10.7853332+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-712163772d637a9cfaa34d4241efb9e9d0ccd6149596c672c613d362f44af841","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T19:02:10.5860178+00:00","lastSuccessAt":"2026-11-09T18:02:23.0088273+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:10.5860178+00:00","snapshotPublishedAt":"2026-11-09T17:03:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-761ecc9061239b0da572dc9254c6f384c1d19339eb08408c436647a2f26129e9","complete":true,"records":3064,"lastAttemptAt":"2026-11-09T19:02:10.8954054+00:00","lastSuccessAt":"2026-11-09T17:05:03.4044794+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:10.8954054+00:00","snapshotPublishedAt":"2026-11-09T16:33:20+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-e3fec63b2a5926ae79916bc9569f5c1069b095db78f2be319f909e69e8e6d7d3","complete":true,"records":231313,"lastAttemptAt":"2026-11-09T19:02:10.6843987+00:00","lastSuccessAt":"2026-11-09T18:04:48.1910635+00:00","error":null,"lastVerifiedAt":"2026-11-09T19:02:10.6843987+00:00","snapshotPublishedAt":"2026-11-09T17:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}