GHSA-2XH3-9JM8-R4R2
Vulnerability from github – Published: 2025-02-10 18:30 – Updated: 2026-05-12 15:30In 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] [ 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] _syssendmsg+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] [ 18.888610] ---[ end trace ]---
{
"affected": [],
"aliases": [
"CVE-2025-21692"
],
"database_specific": {
"cwe_ids": [
"CWE-129"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-10T16:15:38Z",
"severity": "HIGH"
},
"details": "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 ]---",
"id": "GHSA-2xh3-9jm8-r4r2",
"modified": "2026-05-12T15:30:45Z",
"published": "2025-02-10T18:30:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21692"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/03c56665dab1f4ac844bc156652d50d639093fa5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1332c6ed446be787f901ed1064ec6a3c694f028a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/997f6ec4208b23c87daf9f044689685f091826f7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bcf0d815e728a3a304b50455b32a3170c16e1eaa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d62b04fca4340a0d468d7853bd66e511935a18cb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f4168299e553f17aa2ba4016e77a9c38da40eb1d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f6b0f05fbfa4044f890e8a348288c0d9a20bd1d0"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
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|---|
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