netfilter: nfnetlink_queue: make hash table per queue
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] [..] nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] nfnetlink_rcv_msg+0x46a/0x930 kmem_cache_alloc_node_noprof+0x11e/0x450 struct nf_queue_entry is freed via kfree, but parallel cpu can still encounter such an nf_queue_entry when walking the list. Alternative fix is to free the nf_queue_entry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.
CVE-2026-43084
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-43084
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "371de2bef6582a3f58049b3d18e190924af9c9a0",
"lessThan": "22730cb96093b5be0609063bbb1923dbecd61252",
"versionType": "git"
},
{
"status": "affected",
"version": "870e3e63da8e88daffe9d692a025c711658018a8",
"lessThan": "41e3652a178cb0eecd48e0e6e27fbb73a004046a",
"versionType": "git"
},
{
"status": "affected",
"version": "70e2e3ce4f6841e12ec1c104fc76c0e707398ec4",
"lessThan": "9e5ebef91120d2764aefe557c3a484b6288f341f",
"versionType": "git"
},
{
"status": "affected",
"version": "e19079adcd26a25d7d3e586b1837493361fdf8b6",
"lessThan": "936206e3f6ff411581e615e930263d6f8b78df9d",
"versionType": "git"
}
],
"programFiles": [
"include/net/netfilter/nf_queue.h",
"net/netfilter/nfnetlink_queue.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12.75",
"lessThan": "6.12.83",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.14",
"lessThan": "6.18.24",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.19.4",
"lessThan": "6.19.14",
"versionType": "semver"
}
],
"programFiles": [
"include/net/netfilter/nf_queue.h",
"net/netfilter/nfnetlink_queue.c"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-43084
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40020 · Revision 1
- Added to Heist Feed
- Publisher date