CVE-2026-31682

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-25. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: 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:

bridge: br_nd_send: linearize skb before parsing ND options

br_nd_send() parses neighbour discovery options from ns->opt[] and assumes that these options are in the linear part of request.

Its callers only guarantee that the ICMPv6 header and target address are available, so the option area can still be non-linear. Parsing ns->opt[] in that case can access data past the linear buffer.

Linearize request before option parsing and derive ns from the linear network header.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
38.5%
KEV
Not listed

Published

April 25, 2026

Last Modified

July 14, 2026

Advisory Details (8)

Auto-updated Apr 28, 2026
No patch confirmed yet.
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c68433fd291c9e88c00292095172c62d1997d662
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bd91ec85aa4c77d645bd2739fc56784157a88ca2
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a01aee7cafc575bb82f5529e8734e7052f9b16ea
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9c55e41c73af5c4511070933b1bd25248521270c
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/658261898130da620fc3d0fbb0523efb3366cb55
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4f397b950c916e9a1f8a4fce04ea0110206cad47
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3a30f6469b058574f49efde61cd6f5d79e576053
generic

bridge: br_nd_send: linearize skb before parsing ND options - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2ba4caba423ed94d63006eb1d2227b0332ab7fcd

Vendor Advisories for CVE-2026-31682(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 / 42× 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 293 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. 2026-07-06 16:27 UTCEPSS rescore
  13. 2026-07-06 16:27 UTCEPSS rescore
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-05 02:30 UTCEPSS rescore
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-28 14:07 UTCEPSS rescore
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
Show 75 more
  1. 2026-06-27 03:08 UTCEPSS rescore
  2. 2026-06-25 13:49 UTCEPSS rescore
  3. 2026-06-25 13:49 UTCEPSS rescore
  4. 2026-06-24 14:05 UTCEPSS rescore
  5. 2026-06-23 21:33 UTCEPSS rescore
  6. 2026-06-23 21:33 UTCEPSS rescore
  7. 2026-06-22 14:25 UTCEPSS rescore
  8. 2026-06-22 14:25 UTCEPSS rescore
  9. 2026-06-21 14:56 UTCEPSS rescore
  10. 2026-06-21 14:56 UTCEPSS rescore
  11. 2026-06-21 01:59 UTCEPSS rescore
  12. 2026-06-19 19:25 UTCEPSS rescore
  13. 2026-06-19 19:25 UTCEPSS rescore
  14. 2026-06-18 17:52 UTCEPSS rescore
  15. 2026-06-18 17:52 UTCEPSS rescore
  16. 2026-06-17 17:53 UTCEPSS rescore
  17. 2026-06-16 17:52 UTCEPSS rescore
  18. 2026-06-15 17:49 UTCEPSS rescore
  19. 2026-06-15 05:33 UTCEG score recompute
  20. 2026-06-15 05:33 UTCVendor advisory
  21. 2026-06-15 05:33 UTCGHSA enrichment
  22. 2026-06-15 01:49 UTCEG score recompute
  23. 2026-06-15 01:49 UTCVendor advisory
  24. 2026-06-15 01:48 UTCGHSA enrichment
  25. 2026-06-14 23:18 UTCEPSS rescore
  26. 2026-06-14 20:27 UTCEG score recompute
  27. 2026-06-14 20:27 UTCVendor advisory
  28. 2026-06-14 20:27 UTCGHSA enrichment
  29. 2026-06-14 16:37 UTCEG score recompute
  30. 2026-06-14 16:37 UTCVendor advisory
  31. 2026-06-14 16:36 UTCGHSA enrichment
  32. 2026-06-14 11:30 UTCEG score recompute
  33. 2026-06-14 11:30 UTCVendor advisory
  34. 2026-06-14 11:30 UTCGHSA enrichment
  35. 2026-06-13 23:00 UTCEPSS rescore
  36. 2026-06-12 23:12 UTCEPSS rescore
  37. 2026-06-12 23:12 UTCEPSS rescore
  38. 2026-06-12 12:15 UTCEG score recompute
  39. 2026-06-12 12:15 UTCVendor advisory
  40. 2026-06-12 12:14 UTCGHSA enrichment
  41. 2026-06-12 08:28 UTCEG score recompute
  42. 2026-06-12 08:28 UTCVendor advisory
  43. 2026-06-12 08:28 UTCGHSA enrichment
  44. 2026-06-12 04:43 UTCEG score recompute
  45. 2026-06-12 04:43 UTCGHSA enrichment
  46. 2026-06-12 00:58 UTCEG score recompute
  47. 2026-06-12 00:58 UTCVendor advisory
  48. 2026-06-12 00:58 UTCGHSA enrichment
  49. 2026-06-11 21:14 UTCEG score recompute
  50. 2026-06-11 21:14 UTCGHSA enrichment
  51. 2026-06-11 17:31 UTCEG score recompute
  52. 2026-06-11 17:31 UTCVendor advisory
  53. 2026-06-11 17:31 UTCGHSA enrichment
  54. 2026-06-11 14:00 UTCEPSS rescore
  55. 2026-06-11 12:03 UTCEG score recompute
  56. 2026-06-11 12:03 UTCVendor advisory
  57. 2026-06-11 12:02 UTCGHSA enrichment
  58. 2026-06-10 23:06 UTCEG score recompute
  59. 2026-06-10 23:06 UTCVendor advisory
  60. 2026-06-10 23:06 UTCGHSA enrichment
  61. 2026-06-10 22:18 UTCEPSS rescore
  62. 2026-06-10 19:21 UTCEG score recompute
  63. 2026-06-10 19:21 UTCVendor advisory
  64. 2026-06-10 19:21 UTCGHSA enrichment
  65. 2026-06-10 15:37 UTCEG score recompute
  66. 2026-06-10 15:37 UTCVendor advisory
  67. 2026-06-10 15:37 UTCGHSA enrichment
  68. 2026-06-10 13:22 UTCEPSS rescore
  69. 2026-06-10 11:53 UTCEG score recompute
  70. 2026-06-10 11:53 UTCVendor advisory
  71. 2026-06-10 11:53 UTCGHSA enrichment
  72. 2026-06-10 08:09 UTCEG score recompute
  73. 2026-06-10 08:09 UTCVendor advisory
  74. 2026-06-10 08:09 UTCGHSA enrichment
  75. 2026-06-10 03:32 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-31682?
CVE-2026-31682 is a critical vulnerability published on April 25, 2026. In the Linux kernel, the following vulnerability has been resolved: bridge: brndsend: linearize skb before parsing ND options brndsend() parses neighbour discovery options from ns->opt[] and assumes that these options are in the linear part of request. Its callers only guarantee that the ICMPv6…
When was CVE-2026-31682 disclosed?
CVE-2026-31682 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-2026-31682 actively exploited?
CVE-2026-31682 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31682?
CVE-2026-31682 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-31682?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31682, 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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