391 lines
21 KiB
JSON
391 lines
21 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-21692",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-12-29T08:45:45.742Z",
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"datePublished": "2025-02-10T15:58:48.087Z",
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"dateUpdated": "2026-10-15T01:03:11.643Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:53:38.753Z"
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},
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"descriptions": [
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{
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"lang": "en",
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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 <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 ]---"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerability is reached through the rtnetlink/tc interface via the sendmsg() syscall (netlink_sendmsg → rtnetlink_rcv_msg → tc_ctl_tclass → ets_class_change), which requires local system access, not network reachability.\nAC:L - The attacker fully controls the trigger by sending an RTM_NEWTCLASS message with a minor-0 handle (arg=0) and a chosen quantum; the OOB write occurs deterministically at a fixed offset with no race or uncontrollable precondition.\nPR:L - Configuring the ETS qdisc and tclass requires CAP_NET_ADMIN, but this is obtainable by any unprivileged user via an unprivileged user namespace (unshare -Urn) which grants CAP_NET_ADMIN over the new netns containing a usable lo device.\nUI:N - The entire sequence is performed by the attacker's own process via netlink syscalls; no action from any other user is required.\nS:U - The out-of-bounds access and resulting corruption are confined to the kernel's own memory/security authority, a standard local privilege-escalation scenario with no crossing of a security scope boundary.\nC:H - The negative-index pointer feeds both read paths (dump/dump_stats leaking memory adjacent to the qdisc) and a corruption primitive; per kernel guidance an OOB access leveraged toward LPE yields arbitrary-read potential, so Confidentiality is High.\nI:H - cl->quantum = quantum performs a controlled out-of-bounds write into q->active.prev, corrupting a kernel list pointer into a write-what-where primitive; the fix author explicitly notes this may cause local privilege escalation, giving High integrity impact.\nA:H - The corrupted list_head pointer is dereferenced and written during subsequent packet enqueue/dequeue, causing memory corruption and kernel panic/oops, a High availability impact."
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}
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]
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}
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],
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"affected": [
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{
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}
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"title": "net: sched: fix ets qdisc OOB Indexing",
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-10-01T19:51:24.646401Z"
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"description": "CWE-129 Improper Validation of Array Index"
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}
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"dateUpdated": "2025-10-01T19:57:10.054Z"
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},
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"title": "CVE Program Container",
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
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"versions": [
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|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
} |