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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.259, 5.15.209, 6.1.175, 6.12.92, 6.18.34, 6.6.142, 7.0.11
- CVEs
- CVE-2026-52912
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 11:16 UTC · Revision 1
Source evidence
netfilter: nf_queue: hold bridge skb->dev while queued
core-osv · Original sourcePublished 24 Jun 2026, 07:14 UTC
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.
osv:CVE-2026-52912
Kernel
Fixed versions: 5.10.259, 5.15.209, 6.1.175, 6.6.142, 6.12.92, 6.18.34, 7.0.11
Complete source record
{
"id": "4e1a73e421c3de604b7eb33aefa5f531d64329b382abd818d402c8f9253ae6fb",
"url": "https://osv.dev/vulnerability/CVE-2026-52912",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "netfilter: nf_queue: hold bridge skb->dev while queued",
"summary": "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.",
"evidence": "osv:CVE-2026-52912",
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"modified": "2026-10-28T02:30:28.087267987Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/stable/c/15d464265120ab9818bd673af301deee09bedab2",
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"https://nvd.nist.gov/vuln/detail/CVE-2026-52912",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52912.json"
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"evidence": "/id"
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"security_relevant": true,
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"source_id": "core-osv",
"document_id": 494898,
"published_at": "2026-06-24T07:14:10.583+00:00"
}