CVE-2026-43084

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

May 6, 2026

Last Modified

August 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.

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-23ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-23ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-23ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1061.64~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-23ubuntu
linuxKernel @ 6.12.83—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (126 versions)6.19.14-1—

Weakness Classification(1)

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

All Vendor Advisories

(10)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 65× 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 193 total refreshes for this CVE.

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

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 August 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 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-43084?
CVE-2026-43084 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
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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