ghsa-g3gx-vxgx-5xvc
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
netfilter: conntrack: fix using __this_cpu_add in preemptible
Currently in nf_conntrack_hash_check_insert(), when it fails in nf_ct_ext_valid_pre/post(), NF_CT_STAT_INC() will be called in the preemptible context, a call trace can be triggered:
BUG: using __this_cpu_add() in preemptible [00000000] code: conntrack/1636
caller is nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]
Call Trace:
This patch is to fix it by changing to use NF_CT_STAT_INC_ATOMIC() for nf_ct_ext_valid_pre/post() check in nf_conntrack_hash_check_insert(), as well as nf_ct_ext_valid_post() in __nf_conntrack_confirm().
Note that nf_ct_ext_valid_pre() check in __nf_conntrack_confirm() is safe to use NF_CT_STAT_INC(), as it's under local_bh_disable().
{
"affected": [],
"aliases": [
"CVE-2022-48974"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-21T20:15:09Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: fix using __this_cpu_add in preemptible\n\nCurrently in nf_conntrack_hash_check_insert(), when it fails in\nnf_ct_ext_valid_pre/post(), NF_CT_STAT_INC() will be called in the\npreemptible context, a call trace can be triggered:\n\n BUG: using __this_cpu_add() in preemptible [00000000] code: conntrack/1636\n caller is nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x33/0x46\n check_preemption_disabled+0xc3/0xf0\n nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n ctnetlink_create_conntrack+0x3cd/0x4e0 [nf_conntrack_netlink]\n ctnetlink_new_conntrack+0x1c0/0x450 [nf_conntrack_netlink]\n nfnetlink_rcv_msg+0x277/0x2f0 [nfnetlink]\n netlink_rcv_skb+0x50/0x100\n nfnetlink_rcv+0x65/0x144 [nfnetlink]\n netlink_unicast+0x1ae/0x290\n netlink_sendmsg+0x257/0x4f0\n sock_sendmsg+0x5f/0x70\n\nThis patch is to fix it by changing to use NF_CT_STAT_INC_ATOMIC() for\nnf_ct_ext_valid_pre/post() check in nf_conntrack_hash_check_insert(),\nas well as nf_ct_ext_valid_post() in __nf_conntrack_confirm().\n\nNote that nf_ct_ext_valid_pre() check in __nf_conntrack_confirm() is\nsafe to use NF_CT_STAT_INC(), as it\u0027s under local_bh_disable().",
"id": "GHSA-g3gx-vxgx-5xvc",
"modified": "2024-10-25T15:31:26Z",
"published": "2024-10-21T21:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48974"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9464d0b68f11a9bc768370c3260ec02b3550447b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d9bf1138a5db419db13bd9fcd3a7178d6bb20f7c"
}
],
"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"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.