CVE-2025-21692 (GCVE-0-2025-21692)

Vulnerability from cvelistv5 – Published: 2025-02-10 15:58 – Updated: 2026-05-12 12:03
VLAI
Title
net: sched: fix ets qdisc OOB Indexing
Summary
In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ets qdisc OOB Indexing Haowei Yan <g1042620637@gmail.com> found that ets_class_from_arg() can index an Out-Of-Bound class in ets_class_from_arg() when passed clid of 0. The overflow may cause local privilege escalation. [ 18.852298] ------------[ cut here ]------------ [ 18.853271] UBSAN: array-index-out-of-bounds in net/sched/sch_ets.c:93:20 [ 18.853743] index 18446744073709551615 is out of range for type 'ets_class [16]' [ 18.854254] CPU: 0 UID: 0 PID: 1275 Comm: poc Not tainted 6.12.6-dirty #17 [ 18.854821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 [ 18.856532] Call Trace: [ 18.857441] <TASK> [ 18.858227] dump_stack_lvl+0xc2/0xf0 [ 18.859607] dump_stack+0x10/0x20 [ 18.860908] __ubsan_handle_out_of_bounds+0xa7/0xf0 [ 18.864022] ets_class_change+0x3d6/0x3f0 [ 18.864322] tc_ctl_tclass+0x251/0x910 [ 18.864587] ? lock_acquire+0x5e/0x140 [ 18.865113] ? __mutex_lock+0x9c/0xe70 [ 18.866009] ? __mutex_lock+0xa34/0xe70 [ 18.866401] rtnetlink_rcv_msg+0x170/0x6f0 [ 18.866806] ? __lock_acquire+0x578/0xc10 [ 18.867184] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 18.867503] netlink_rcv_skb+0x59/0x110 [ 18.867776] rtnetlink_rcv+0x15/0x30 [ 18.868159] netlink_unicast+0x1c3/0x2b0 [ 18.868440] netlink_sendmsg+0x239/0x4b0 [ 18.868721] ____sys_sendmsg+0x3e2/0x410 [ 18.869012] ___sys_sendmsg+0x88/0xe0 [ 18.869276] ? rseq_ip_fixup+0x198/0x260 [ 18.869563] ? rseq_update_cpu_node_id+0x10a/0x190 [ 18.869900] ? trace_hardirqs_off+0x5a/0xd0 [ 18.870196] ? syscall_exit_to_user_mode+0xcc/0x220 [ 18.870547] ? do_syscall_64+0x93/0x150 [ 18.870821] ? __memcg_slab_free_hook+0x69/0x290 [ 18.871157] __sys_sendmsg+0x69/0xd0 [ 18.871416] __x64_sys_sendmsg+0x1d/0x30 [ 18.871699] x64_sys_call+0x9e2/0x2670 [ 18.871979] do_syscall_64+0x87/0x150 [ 18.873280] ? do_syscall_64+0x93/0x150 [ 18.874742] ? lock_release+0x7b/0x160 [ 18.876157] ? do_user_addr_fault+0x5ce/0x8f0 [ 18.877833] ? irqentry_exit_to_user_mode+0xc2/0x210 [ 18.879608] ? irqentry_exit+0x77/0xb0 [ 18.879808] ? clear_bhb_loop+0x15/0x70 [ 18.880023] ? clear_bhb_loop+0x15/0x70 [ 18.880223] ? clear_bhb_loop+0x15/0x70 [ 18.880426] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 18.880683] RIP: 0033:0x44a957 [ 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 [ 18.881766] RSP: 002b:00007ffcdd00fad8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 18.882149] RAX: ffffffffffffffda RBX: 00007ffcdd010db8 RCX: 000000000044a957 [ 18.882507] RDX: 0000000000000000 RSI: 00007ffcdd00fb70 RDI: 0000000000000003 [ 18.885037] RBP: 00007ffcdd010bc0 R08: 000000000703c770 R09: 000000000703c7c0 [ 18.887203] R10: 0000000000000080 R11: 0000000000000246 R12: 0000000000000001 [ 18.888026] R13: 00007ffcdd010da8 R14: 00000000004ca7d0 R15: 0000000000000001 [ 18.888395] </TASK> [ 18.888610] ---[ end trace ]---
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-129 - Improper Validation of Array Index
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 , < 03c56665dab1f4ac844bc156652d50d639093fa5 (git)
Affected: dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 , < bcf0d815e728a3a304b50455b32a3170c16e1eaa (git)
Affected: dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 , < 1332c6ed446be787f901ed1064ec6a3c694f028a (git)
Affected: dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 , < f4168299e553f17aa2ba4016e77a9c38da40eb1d (git)
Affected: dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 , < 997f6ec4208b23c87daf9f044689685f091826f7 (git)
Affected: dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 , < f6b0f05fbfa4044f890e8a348288c0d9a20bd1d0 (git)
Affected: dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 , < d62b04fca4340a0d468d7853bd66e511935a18cb (git)
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Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.234 , ≤ 5.10.* (semver)
Unaffected: 5.15.178 , ≤ 5.15.* (semver)
Unaffected: 6.1.128 , ≤ 6.1.* (semver)
Unaffected: 6.6.75 , ≤ 6.6.* (semver)
Unaffected: 6.12.12 , ≤ 6.12.* (semver)
Unaffected: 6.13.1 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.2 (custom)
Create a notification for this product.
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Affected: 0 , < V3.2 (custom)
Create a notification for this product.
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.2 (custom)
Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix ets qdisc OOB Indexing\n\nHaowei Yan \u003cg1042620637@gmail.com\u003e 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 \u0027ets_class [16]\u0027\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]  \u003cTASK\u003e\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 \u003c48\u003e 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]  \u003c/TASK\u003e\n [   18.888610] ---[ end trace ]---"
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    "cveId": "CVE-2025-21692",
    "datePublished": "2025-02-10T15:58:48.087Z",
    "dateReserved": "2024-12-29T08:45:45.742Z",
    "dateUpdated": "2026-05-12T12:03:12.985Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-21692",
      "date": "2026-06-08",
      "epss": "0.00021",
      "percentile": "0.05916"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21692\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-10T16:15:38.763\",\"lastModified\":\"2026-05-12T13:16:31.877\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: sched: fix ets qdisc OOB Indexing\\n\\nHaowei Yan \u003cg1042620637@gmail.com\u003e 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 \u0027ets_class [16]\u0027\\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]  \u003cTASK\u003e\\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 \u003c48\u003e 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]  \u003c/TASK\u003e\\n [   18.888610] ---[ end trace ]---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: sched: fix ets qdisc OOB Indexing Haowei Yan  descubri\u00f3 que ets_class_from_arg() puede indexar una clase fuera de los l\u00edmites en ets_class_from_arg() cuando se le pasa un clid de 0. El desbordamiento puede provocar una escalada de privilegios locales. [ 18.852298] ------------[ cut here ]------------ [ 18.853271] UBSAN: array-index-out-of-bounds in net/sched/sch_ets.c:93:20 [ 18.853743] index 18446744073709551615 is out of range for type \u0027ets_class [16]\u0027 [ 18.854254] CPU: 0 UID: 0 PID: 1275 Comm: poc Not tainted 6.12.6-dirty #17 [ 18.854821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 [ 18.856532] Call Trace: [ 18.857441]  [ 18.858227] dump_stack_lvl+0xc2/0xf0 [ 18.859607] dump_stack+0x10/0x20 [ 18.860908] __ubsan_handle_out_of_bounds+0xa7/0xf0 [ 18.864022] ets_class_change+0x3d6/0x3f0 [ 18.864322] tc_ctl_tclass+0x251/0x910 [ 18.864587] ? lock_acquire+0x5e/0x140 [ 18.865113] ? __mutex_lock+0x9c/0xe70 [ 18.866009] ? __mutex_lock+0xa34/0xe70 [ 18.866401] rtnetlink_rcv_msg+0x170/0x6f0 [ 18.866806] ? __lock_acquire+0x578/0xc10 [ 18.867184] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 18.867503] netlink_rcv_skb+0x59/0x110 [ 18.867776] rtnetlink_rcv+0x15/0x30 [ 18.868159] netlink_unicast+0x1c3/0x2b0 [ 18.868440] netlink_sendmsg+0x239/0x4b0 [ 18.868721] ____sys_sendmsg+0x3e2/0x410 [ 18.869012] ___sys_sendmsg+0x88/0xe0 [ 18.869276] ? rseq_ip_fixup+0x198/0x260 [ 18.869563] ? rseq_update_cpu_node_id+0x10a/0x190 [ 18.869900] ? trace_hardirqs_off+0x5a/0xd0 [ 18.870196] ? syscall_exit_to_user_mode+0xcc/0x220 [ 18.870547] ? do_syscall_64+0x93/0x150 [ 18.870821] ? __memcg_slab_free_hook+0x69/0x290 [ 18.871157] __sys_sendmsg+0x69/0xd0 [ 18.871416] __x64_sys_sendmsg+0x1d/0x30 [ 18.871699] x64_sys_call+0x9e2/0x2670 [ 18.871979] do_syscall_64+0x87/0x150 [ 18.873280] ? do_syscall_64+0x93/0x150 [ 18.874742] ? lock_release+0x7b/0x160 [ 18.876157] ? do_user_addr_fault+0x5ce/0x8f0 [ 18.877833] ? irqentry_exit_to_user_mode+0xc2/0x210 [ 18.879608] ? irqentry_exit+0x77/0xb0 [ 18.879808] ? clear_bhb_loop+0x15/0x70 [ 18.880023] ? clear_bhb_loop+0x15/0x70 [ 18.880223] ? clear_bhb_loop+0x15/0x70 [ 18.880426] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 18.880683] RIP: 0033:0x44a957 [ 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 \u0026lt;48\u0026gt; 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 8974 24 10 [ 18.881766] RSP: 002b:00007ffcdd00fad8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 18.882149] RAX: ffffffffffffffda RBX: 00007ffcdd010db8 RCX: 000000000044a957 [ 18.882507] RDX: 0000000000000000 RSI: 00007ffcdd00fb70 RDI: 0000000000000003 [ 18.885037] RBP: 00007ffcdd010bc0 R08: 000000000703c770 R09: 000000000703c7c0 [ 18.887203] R10: 0000000000000080 R11: 0000000000000246 R12: 0000000000000001 [ 18.888026] R13: 00007ffcdd010da8 R14: 00000000004ca7d0 R15: 0000000000000001 [ 18.888395]  [ 18.888610] ---[ end trace 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    "vulnrichment": {
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\"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\", \"lessThan\": \"03c56665dab1f4ac844bc156652d50d639093fa5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\", \"lessThan\": \"bcf0d815e728a3a304b50455b32a3170c16e1eaa\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\", \"lessThan\": \"1332c6ed446be787f901ed1064ec6a3c694f028a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\", \"lessThan\": \"f4168299e553f17aa2ba4016e77a9c38da40eb1d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\", \"lessThan\": \"997f6ec4208b23c87daf9f044689685f091826f7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\", \"lessThan\": \"f6b0f05fbfa4044f890e8a348288c0d9a20bd1d0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33\", \"lessThan\": \"d62b04fca4340a0d468d7853bd66e511935a18cb\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/sch_ets.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.234\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.178\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.128\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.75\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/sch_ets.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/03c56665dab1f4ac844bc156652d50d639093fa5\"}, {\"url\": \"https://git.kernel.org/stable/c/bcf0d815e728a3a304b50455b32a3170c16e1eaa\"}, {\"url\": \"https://git.kernel.org/stable/c/1332c6ed446be787f901ed1064ec6a3c694f028a\"}, {\"url\": \"https://git.kernel.org/stable/c/f4168299e553f17aa2ba4016e77a9c38da40eb1d\"}, {\"url\": \"https://git.kernel.org/stable/c/997f6ec4208b23c87daf9f044689685f091826f7\"}, {\"url\": \"https://git.kernel.org/stable/c/f6b0f05fbfa4044f890e8a348288c0d9a20bd1d0\"}, {\"url\": \"https://git.kernel.org/stable/c/d62b04fca4340a0d468d7853bd66e511935a18cb\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: sched: fix ets qdisc OOB Indexing\\n\\nHaowei Yan \u003cg1042620637@gmail.com\u003e 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 \u0027ets_class [16]\u0027\\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]  \u003cTASK\u003e\\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 \u003c48\u003e 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]  \u003c/TASK\u003e\\n [   18.888610] ---[ end trace ]---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.234\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.178\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.128\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.75\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.12\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.1\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"5.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:04:34.872Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21692\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-12T12:03:12.985Z\", \"dateReserved\": \"2024-12-29T08:45:45.742Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-10T15:58:48.087Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.