CVE-2026-43084

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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: 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.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
2.6%
KEV
Not listed

Published

May 6, 2026

Last Modified

June 5, 2026

Advisory Details (4)

Auto-updated May 20, 2026
No patch confirmed yet.
generic

netfilter: nfnetlink_queue: make hash table per queue - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f
generic

netfilter: nfnetlink_queue: make hash table per queue - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d
generic

netfilter: nfnetlink_queue: make hash table per queue - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a
generic

netfilter: nfnetlink_queue: make hash table per queue - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252

Vendor Advisories for CVE-2026-43084(1)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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.

Showing the most recent 100 of 119 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-01 15:06 UTCEPSS rescore
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-29 14:06 UTCEPSS rescore
  15. 2026-06-28 14:07 UTCEPSS rescore
  16. 2026-06-28 04:56 UTCEPSS rescore
  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-25 13:49 UTCEPSS rescore
  19. 2026-06-25 13:49 UTCEPSS rescore
  20. 2026-06-24 14:05 UTCEPSS rescore
  21. 2026-06-23 21:33 UTCEPSS rescore
  22. 2026-06-22 14:25 UTCEPSS rescore
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-21 14:56 UTCEPSS rescore
  25. 2026-06-21 14:56 UTCEPSS rescore
Show 75 more
  1. 2026-06-21 01:59 UTCEPSS rescore
  2. 2026-06-19 19:25 UTCEPSS rescore
  3. 2026-06-18 17:52 UTCEPSS rescore
  4. 2026-06-18 17:52 UTCEPSS rescore
  5. 2026-06-17 17:53 UTCEPSS rescore
  6. 2026-06-16 17:52 UTCEPSS rescore
  7. 2026-06-15 17:49 UTCEPSS rescore
  8. 2026-06-14 20:14 UTCEG score recompute
  9. 2026-06-14 20:14 UTCGHSA enrichment
  10. 2026-06-14 07:45 UTCEG score recompute
  11. 2026-06-14 07:45 UTCGHSA enrichment
  12. 2026-06-13 23:00 UTCEPSS rescore
  13. 2026-06-13 01:10 UTCEG score recompute
  14. 2026-06-13 01:09 UTCGHSA enrichment
  15. 2026-06-12 23:12 UTCEPSS rescore
  16. 2026-06-12 23:12 UTCEPSS rescore
  17. 2026-06-12 02:51 UTCEG score recompute
  18. 2026-06-12 02:51 UTCGHSA enrichment
  19. 2026-06-11 14:23 UTCEG score recompute
  20. 2026-06-11 14:23 UTCGHSA enrichment
  21. 2026-06-11 14:00 UTCEPSS rescore
  22. 2026-06-11 01:54 UTCEG score recompute
  23. 2026-06-11 01:54 UTCGHSA enrichment
  24. 2026-06-10 22:18 UTCEPSS rescore
  25. 2026-06-10 13:22 UTCEPSS rescore
  26. 2026-06-10 13:22 UTCEPSS rescore
  27. 2026-06-10 11:42 UTCEG score recompute
  28. 2026-06-10 11:42 UTCGHSA enrichment
  29. 2026-06-09 23:14 UTCEG score recompute
  30. 2026-06-09 23:14 UTCGHSA enrichment
  31. 2026-06-09 10:45 UTCEG score recompute
  32. 2026-06-09 10:45 UTCGHSA enrichment
  33. 2026-06-08 22:17 UTCEG score recompute
  34. 2026-06-08 22:17 UTCGHSA enrichment
  35. 2026-06-08 14:17 UTCEPSS rescore
  36. 2026-06-08 14:17 UTCEPSS rescore
  37. 2026-06-08 04:09 UTCEG score recompute
  38. 2026-06-08 04:08 UTCGHSA enrichment
  39. 2026-06-07 15:39 UTCEG score recompute
  40. 2026-06-07 15:39 UTCGHSA enrichment
  41. 2026-06-07 15:25 UTCEPSS rescore
  42. 2026-06-07 15:25 UTCEPSS rescore
  43. 2026-06-07 03:10 UTCEG score recompute
  44. 2026-06-07 03:10 UTCGHSA enrichment
  45. 2026-06-06 14:41 UTCEG score recompute
  46. 2026-06-06 14:41 UTCGHSA enrichment
  47. 2026-06-06 13:47 UTCEPSS rescore
  48. 2026-06-06 13:47 UTCEPSS rescore
  49. 2026-06-06 02:10 UTCEG score recompute
  50. 2026-06-06 02:10 UTCGHSA enrichment
  51. 2026-06-05 22:47 UTCEPSS rescore
  52. 2026-06-05 13:38 UTCEG score recompute
  53. 2026-06-05 13:38 UTCGHSA enrichment
  54. 2026-06-05 06:10 UTCEPSS rescore
  55. 2026-06-05 06:10 UTCEPSS rescore
  56. 2026-06-05 01:07 UTCEG score recompute
  57. 2026-06-05 01:07 UTCGHSA enrichment
  58. 2026-06-04 13:12 UTCEPSS rescore
  59. 2026-06-04 13:12 UTCEPSS rescore
  60. 2026-06-04 12:37 UTCEG score recompute
  61. 2026-06-04 12:37 UTCGHSA enrichment
  62. 2026-06-04 00:08 UTCEG score recompute
  63. 2026-06-04 00:08 UTCGHSA enrichment
  64. 2026-06-03 11:39 UTCEG score recompute
  65. 2026-06-03 11:39 UTCGHSA enrichment
  66. 2026-06-02 23:10 UTCEG score recompute
  67. 2026-06-02 23:10 UTCGHSA enrichment
  68. 2026-06-02 20:13 UTCEPSS rescore
  69. 2026-06-02 10:41 UTCEG score recompute
  70. 2026-06-02 10:41 UTCGHSA enrichment
  71. 2026-06-01 22:12 UTCEG score recompute
  72. 2026-06-01 22:12 UTCGHSA enrichment
  73. 2026-06-01 13:52 UTCEPSS rescore
  74. 2026-06-01 13:52 UTCEPSS rescore
  75. 2026-06-01 09:43 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-43084?
CVE-2026-43084 is a high vulnerability published on May 6, 2026. 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 nfqnlrecvverdict+0x11ac/0x15e0 [nfnetlink_queue] [..]…
When was CVE-2026-43084 disclosed?
CVE-2026-43084 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on June 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43084 actively exploited?
CVE-2026-43084 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43084?
CVE-2026-43084 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43084?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43084, 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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