CVE-2026-31674

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-04-25. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: 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: ip6t_rt: reject oversized addrnr in rt_mt6_check()

Reject rt match rules whose addrnr exceeds IP6T_RT_HOPS.

rt_mt6() expects addrnr to stay within the bounds of rtinfo->addrs[]. Validate addrnr during rule installation so malformed rules are rejected before the match logic can use an out-of-range value.

CVSS v3
7.1
EG Score
7.1(medium)
EPSS
2.4%
KEV
Not listed

Published

April 25, 2026

Last Modified

July 14, 2026

Advisory Details (8)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ded71f5684df16fa645cca5bf4fe6b0cd8a46119
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d8795fde1f78669a87c87ac29fceab2f104daa8c
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/af9b7e2b765966457f4ec23be5bd34a141f89574
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a28ebf6f99de270d6338ccdc3b49f3e818f99b7b
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9d3f027327c2fa265f7f85ead41294792c3296ed
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/29ea965a1353bc8303877422f79c8211e9ba9c55
generic

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa

Vendor Advisories for CVE-2026-31674(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 7× in last 7d / 35× 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 163 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-31674?
CVE-2026-31674 is a high vulnerability published on April 25, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6trt: reject oversized addrnr in rtmt6_check() Reject rt match rules whose addrnr exceeds IP6TRTHOPS. rt_mt6() expects addrnr to stay within the bounds of rtinfo->addrs[]. Validate addrnr during rule installation so…
When was CVE-2026-31674 disclosed?
CVE-2026-31674 was first published in the National Vulnerability Database on April 25, 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-2026-31674 actively exploited?
CVE-2026-31674 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31674?
CVE-2026-31674 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-31674?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31674, 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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