CVE-2026-43025

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. the CNA's CVSS baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 3 sources updated this week
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: ctnetlink: ignore explicit helper on new expectations

Use the existing master conntrack helper, anything else is not really supported and it just makes validation more complicated, so just ignore what helper userspace suggests for this expectation.

This was uncovered when validating CTA_EXPECT_CLASS via different helper provided by userspace than the existing master conntrack helper:

BUG: KASAN: slab-out-of-bounds in nf_ct_expect_related_report+0x2479/0x27c0 Read of size 4 at addr ffff8880043fe408 by task poc/102 Call Trace: nf_ct_expect_related_report+0x2479/0x27c0 ctnetlink_create_expect+0x22b/0x3b0 ctnetlink_new_expect+0x4bd/0x5c0 nfnetlink_rcv_msg+0x67a/0x950 netlink_rcv_skb+0x120/0x350

Allowing to read kernel memory bytes off the expectation boundary.

CTA_EXPECT_HELP_NAME is still used to offer the helper name to userspace via netlink dump.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 1, 2026

Last Modified

September 8, 2026

Advisory Details (6)

Auto-updated May 6, 2026
No patch confirmed yet.
generic

netfilter: ctnetlink: ignore explicit helper on new expectations - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e135f8e8212cbed12a03ab8dec77fa1247139897
generic

netfilter: ctnetlink: ignore explicit helper on new expectations - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/917b61fa2042f11e2af4c428e43f08199586633a
generic

netfilter: ctnetlink: ignore explicit helper on new expectations - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2ea0f35f235f70c133ad61fe05ba013753b978c6
generic

netfilter: ctnetlink: ignore explicit helper on new expectations - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/21a04c31db4057deec85fcd6cc63d720b38819c3
generic

netfilter: ctnetlink: ignore explicit helper on new expectations - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/187b6ec5229ea93cb04c4f6d3b52efc80f513d0d
generic

netfilter: ctnetlink: ignore explicit helper on new expectations - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f6c33697ccfac6499d0b7a4dbdec5d3a3a566cd

Vendor Advisories for CVE-2026-43025(1)

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

Patch Availability(15)

Vendor / EcosystemFixed in / PatchReleasedSource
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-lts-24.04 (6.8.0-1063.71) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-23ubuntu
linuxKernel @ 6.1.168—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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions)6.1.170-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (125 versions)6.19.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(14)

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 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 215 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43025?
CVE-2026-43025 is a high vulnerability published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: ignore explicit helper on new expectations Use the existing master conntrack helper, anything else is not really supported and it just makes validation more complicated, so just ignore what helper userspace…
When was CVE-2026-43025 disclosed?
CVE-2026-43025 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43025 actively exploited?
CVE-2026-43025 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 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-43025?
CVE-2026-43025 has a CVSS v4.0 base score of 7.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-43025?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43025, 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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