CVE Watchtower

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CVE-2026-52912NVD

Vulnerability 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.
Severity Level
HIGH(7.8)
Published Date
Jun 24, 2026
Last Modified
Oct 19, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.16%Probability
Root Weakness (CWE)
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 7.8 (HIGH)
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Linux Linux Kernel >= 4.7 and < 5.10.259
  • Linux Linux Kernel >= 5.11 and < 5.15.209
  • Linux Linux Kernel >= 5.16 and < 6.1.175
  • Linux Linux Kernel >= 6.2 and < 6.6.142
  • Linux Linux Kernel >= 6.7 and < 6.12.92
  • Linux Linux Kernel >= 6.13 and < 6.18.34
  • Linux Linux Kernel >= 6.19 and < 7.0.11
  • Linux Linux Kernel
Patched Versions
  • Linux Linux Kernel 5.10.259
  • Linux Linux Kernel 5.15.209
  • Linux Linux Kernel 6.1.175
  • Linux Linux Kernel 6.6.142
  • Linux Linux Kernel 6.12.92
  • Linux Linux Kernel 6.18.34
  • Linux Linux Kernel 7.0.11
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
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🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
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