GHSA-8MHP-PMJG-F6CW
Vulnerability from github – Published: 2024-02-27 09:31 – Updated: 2024-04-10 15:30In the Linux kernel, the following vulnerability has been resolved:
netfilter: nftables: clone set element expression template
memcpy() breaks when using connlimit in set elements. Use nft_expr_clone() to initialize the connlimit expression list, otherwise connlimit garbage collector crashes when walking on the list head copy.
[ 493.064656] Workqueue: events_power_efficient nft_rhash_gc [nf_tables] [ 493.064685] RIP: 0010:find_or_evict+0x5a/0x90 [nf_conncount] [ 493.064694] Code: 2b 43 40 83 f8 01 77 0d 48 c7 c0 f5 ff ff ff 44 39 63 3c 75 df 83 6d 18 01 48 8b 43 08 48 89 de 48 8b 13 48 8b 3d ee 2f 00 00 <48> 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 03 48 83 [ 493.064699] RSP: 0018:ffffc90000417dc0 EFLAGS: 00010297 [ 493.064704] RAX: 0000000000000000 RBX: ffff888134f38410 RCX: 0000000000000000 [ 493.064708] RDX: 0000000000000000 RSI: ffff888134f38410 RDI: ffff888100060cc0 [ 493.064711] RBP: ffff88812ce594a8 R08: ffff888134f38438 R09: 00000000ebb9025c [ 493.064714] R10: ffffffff8219f838 R11: 0000000000000017 R12: 0000000000000001 [ 493.064718] R13: ffffffff82146740 R14: ffff888134f38410 R15: 0000000000000000 [ 493.064721] FS: 0000000000000000(0000) GS:ffff88840e440000(0000) knlGS:0000000000000000 [ 493.064725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 493.064729] CR2: 0000000000000008 CR3: 00000001330aa002 CR4: 00000000001706e0 [ 493.064733] Call Trace: [ 493.064737] nf_conncount_gc_list+0x8f/0x150 [nf_conncount] [ 493.064746] nft_rhash_gc+0x106/0x390 [nf_tables]
{
"affected": [],
"aliases": [
"CVE-2021-46913"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-27T07:15:07Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nftables: clone set element expression template\n\nmemcpy() breaks when using connlimit in set elements. Use\nnft_expr_clone() to initialize the connlimit expression list, otherwise\nconnlimit garbage collector crashes when walking on the list head copy.\n\n[ 493.064656] Workqueue: events_power_efficient nft_rhash_gc [nf_tables]\n[ 493.064685] RIP: 0010:find_or_evict+0x5a/0x90 [nf_conncount]\n[ 493.064694] Code: 2b 43 40 83 f8 01 77 0d 48 c7 c0 f5 ff ff ff 44 39 63 3c 75 df 83 6d 18 01 48 8b 43 08 48 89 de 48 8b 13 48 8b 3d ee 2f 00 00 \u003c48\u003e 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 03 48 83\n[ 493.064699] RSP: 0018:ffffc90000417dc0 EFLAGS: 00010297\n[ 493.064704] RAX: 0000000000000000 RBX: ffff888134f38410 RCX: 0000000000000000\n[ 493.064708] RDX: 0000000000000000 RSI: ffff888134f38410 RDI: ffff888100060cc0\n[ 493.064711] RBP: ffff88812ce594a8 R08: ffff888134f38438 R09: 00000000ebb9025c\n[ 493.064714] R10: ffffffff8219f838 R11: 0000000000000017 R12: 0000000000000001\n[ 493.064718] R13: ffffffff82146740 R14: ffff888134f38410 R15: 0000000000000000\n[ 493.064721] FS: 0000000000000000(0000) GS:ffff88840e440000(0000) knlGS:0000000000000000\n[ 493.064725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 493.064729] CR2: 0000000000000008 CR3: 00000001330aa002 CR4: 00000000001706e0\n[ 493.064733] Call Trace:\n[ 493.064737] nf_conncount_gc_list+0x8f/0x150 [nf_conncount]\n[ 493.064746] nft_rhash_gc+0x106/0x390 [nf_tables]",
"id": "GHSA-8mhp-pmjg-f6cw",
"modified": "2024-04-10T15:30:31Z",
"published": "2024-02-27T09:31:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46913"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/47d8de3c226574a3ddb8b87d0c152028d1bafef4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4d8f9065830e526c83199186c5f56a6514f457d2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e51ff3ffc316377cca21de8b80404eed0c37b3c3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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