CVE-2026-52912

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.8
EG Score
7.8(high)
EPSS
3.8%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 28, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e196115ec330a18de415bdb9f5071aa9f08e53ce
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a698ac8ab2561cf575d2d9f34095032651dd952e
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/950d809f154dca04e5fbe5d3c8b9c5e44769cd57
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3fb0f5c0f64162a8c3f25616a4f1e340b921737f
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3823c27099cfe2482299065814adbaa771be9644
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/19924bdd8a45ebc72a7b84c57fd63057d1dc75ac
generic

netfilter: nf_queue: hold bridge skb->dev while queued - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/15d464265120ab9818bd673af301deee09bedab2

Vendor Advisories for CVE-2026-52912(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 50× in last 7d / 66× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 23:24 UTCEG score recompute
  2. 2026-07-06 23:24 UTCVendor advisory
  3. 2026-07-06 23:24 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 11:38 UTCEG score recompute
  7. 2026-07-06 11:38 UTCVendor advisory
  8. 2026-07-06 11:38 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 23:48 UTCEG score recompute
  12. 2026-07-05 23:48 UTCVendor advisory
  13. 2026-07-05 23:48 UTCGHSA enrichment
  14. 2026-07-05 12:02 UTCEG score recompute
  15. 2026-07-05 12:02 UTCVendor advisory
  16. 2026-07-05 12:02 UTCGHSA enrichment
  17. 2026-07-05 02:30 UTCEPSS rescore
  18. 2026-07-05 00:16 UTCEG score recompute
  19. 2026-07-05 00:16 UTCVendor advisory
  20. 2026-07-05 00:16 UTCGHSA enrichment
  21. 2026-07-04 12:31 UTCEG score recompute
  22. 2026-07-04 12:31 UTCVendor advisory
  23. 2026-07-04 12:31 UTCGHSA enrichment
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-04 00:45 UTCEG score recompute
Show 41 more
  1. 2026-07-04 00:45 UTCVendor advisory
  2. 2026-07-04 00:45 UTCGHSA enrichment
  3. 2026-07-03 12:50 UTCEG score recompute
  4. 2026-07-03 12:50 UTCVendor advisory
  5. 2026-07-03 12:50 UTCGHSA enrichment
  6. 2026-07-03 00:38 UTCEG score recompute
  7. 2026-07-03 00:38 UTCVendor advisory
  8. 2026-07-03 00:38 UTCGHSA enrichment
  9. 2026-07-02 12:52 UTCEG score recompute
  10. 2026-07-02 12:52 UTCVendor advisory
  11. 2026-07-02 12:52 UTCGHSA enrichment
  12. 2026-07-02 01:07 UTCEG score recompute
  13. 2026-07-02 01:07 UTCVendor advisory
  14. 2026-07-02 01:07 UTCGHSA enrichment
  15. 2026-07-01 15:07 UTCEPSS rescore
  16. 2026-07-01 13:22 UTCEG score recompute
  17. 2026-07-01 13:22 UTCVendor advisory
  18. 2026-07-01 13:22 UTCGHSA enrichment
  19. 2026-07-01 01:37 UTCEG score recompute
  20. 2026-07-01 01:37 UTCVendor advisory
  21. 2026-07-01 01:37 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 13:51 UTCEG score recompute
  24. 2026-06-30 13:51 UTCVendor advisory
  25. 2026-06-30 13:51 UTCGHSA enrichment
  26. 2026-06-30 02:06 UTCEG score recompute▲ 7.80
  27. 2026-06-30 02:06 UTCVendor advisory
  28. 2026-06-30 02:06 UTCGHSA enrichment
  29. 2026-06-29 14:06 UTCEPSS rescore
  30. 2026-06-29 14:06 UTCEPSS rescore
  31. 2026-06-28 14:07 UTCEPSS rescore
  32. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  33. 2026-06-28 04:56 UTCEPSS rescore
  34. 2026-06-28 04:56 UTCEPSS rescore
  35. 2026-06-27 05:24 UTCEG score recompute
  36. 2026-06-27 05:24 UTCGHSA enrichment
  37. 2026-06-27 03:08 UTCEPSS rescore
  38. 2026-06-25 13:49 UTCEPSS rescore
  39. 2026-06-24 14:05 UTCEPSS rescore
  40. 2026-06-24 08:42 UTCEG score recompute
  41. 2026-06-24 08:40 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-52912?
CVE-2026-52912 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued brpassframe_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…
When was CVE-2026-52912 disclosed?
CVE-2026-52912 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52912 actively exploited?
CVE-2026-52912 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52912?
CVE-2026-52912 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-52912?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52912, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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