CVE-2026-31414

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: 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_conntrack_expect: use expect->helper

Use expect->helper in ctnetlink and /proc to dump the helper name. Using nfct_help() without holding a reference to the master conntrack is unsafe.

Use exp->master->helper in ctnetlink path if userspace does not provide an explicit helper when creating an expectation to retain the existing behaviour. The ctnetlink expectation path holds the reference on the master conntrack and nf_conntrack_expect lock and the nfnetlink glue path refers to the master ct that is attached to the skb.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
32.1%
KEV
Not listed

Published

April 13, 2026

Last Modified

July 14, 2026

Advisory Details (6)

Auto-updated Jun 21, 2026
No patch confirmed yet.
generic

netfilter: nf_conntrack_expect: use expect->helper - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d
generic

netfilter: nf_conntrack_expect: use expect->helper - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306
generic

netfilter: nf_conntrack_expect: use expect->helper - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817
generic

netfilter: nf_conntrack_expect: use expect->helper - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781
generic

netfilter: nf_conntrack_expect: use expect->helper - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417
generic

netfilter: nf_conntrack_expect: use expect->helper - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0

Vendor Advisories for CVE-2026-31414(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 10× in last 7d / 41× 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 192 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-31414?
CVE-2026-31414 is a critical vulnerability published on April 13, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrackexpect: use expect->helper Use expect->helper in ctnetlink and /proc to dump the helper name. Using nfct_help() without holding a reference to the master conntrack is unsafe. Use exp->master->helper in…
When was CVE-2026-31414 disclosed?
CVE-2026-31414 was first published in the National Vulnerability Database on April 13, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31414 actively exploited?
CVE-2026-31414 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31414?
CVE-2026-31414 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-31414?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31414, 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.

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