netfilter: nf_queue: hold bridge skb->dev while queued
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge master before queueing bridge LOCAL_IN packets. NFQUEUE only holds references on state.in/out and bridge physdevs, so a queued bridge packet can retain a freed bridge master in skb->dev until reinjection. When the verdict is reinjected later, br_netif_receive_skb() re-enters the receive path with skb->dev still pointing at the freed bridge master, triggering a use-after-free. Store skb->dev in the queue entry, hold a reference on it for the queue lifetime, and use the saved device when dropping queued packets during NETDEV_DOWN handling.
CVE-2026-52912
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-2026-52912
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": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "950d809f154dca04e5fbe5d3c8b9c5e44769cd57",
"versionType": "git"
},
{
"status": "affected",
"version": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "a698ac8ab2561cf575d2d9f34095032651dd952e",
"versionType": "git"
},
{
"status": "affected",
"version": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "19924bdd8a45ebc72a7b84c57fd63057d1dc75ac",
"versionType": "git"
},
{
"status": "affected",
"version": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be",
"versionType": "git"
},
{
"status": "affected",
"version": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "3823c27099cfe2482299065814adbaa771be9644",
"versionType": "git"
},
{
"status": "affected",
"version": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "15d464265120ab9818bd673af301deee09bedab2",
"versionType": "git"
},
{
"status": "affected",
"version": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "3fb0f5c0f64162a8c3f25616a4f1e340b921737f",
"versionType": "git"
},
{
"status": "affected",
"version": "ac28634456867b23b95faccba7997a62ec430603",
"lessThan": "e196115ec330a18de415bdb9f5071aa9f08e53ce",
"versionType": "git"
}
],
"programFiles": [
"include/net/netfilter/nf_queue.h",
"net/netfilter/nf_queue.c",
"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": "4.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.142",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.92",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/net/netfilter/nf_queue.h",
"net/netfilter/nf_queue.c",
"net/netfilter/nfnetlink_queue.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-52912
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40689 · Revision 1
- Added to Heist Feed
- Publisher date