CVE-2026-31674

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

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

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

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)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

April 25, 2026

Last Modified

August 5, 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.

Patch Availability(25)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-05ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-05ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-05ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-05ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-05ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-05ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-05ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-05ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1063.71~22.04.1) @ jammy2026-08-05ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-05ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-05ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-08-05ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-05ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-05ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-05ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-05ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-05ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-05ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-05ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-05ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-05ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-05ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-05ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-05ubuntu
linuxKernel @ 5.10.253—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 ... 5.10.92-2 (53 versions)5.10.257-1—
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 (121 versions)6.19.11-1—

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 68× 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 247 total refreshes for this CVE.

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

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 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-2026-31674 actively exploited?
CVE-2026-31674 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 97.7% of all scored CVEs.
What is the CVSS score of CVE-2026-31674?
CVE-2026-31674 has a CVSS v4.0 base score of 7.1 (CNA self-assessment; NVD's own analysis pending).
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.

Dependency Blast Radius

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