CVE-2026-31676

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-25. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

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

rxrpc: only handle RESPONSE during service challenge

Only process RESPONSE packets while the service connection is still in RXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before running response verification and security initialization, then use a local secured flag to decide whether to queue the secured-connection work after the state transition. This keeps duplicate or late RESPONSE packets from re-running the setup path and removes the unlocked post-transition state test.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
31.1%
KEV
Not listed

Published

April 25, 2026

Last Modified

June 1, 2026

Advisory Details (8)

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

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8
generic

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c
generic

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585
generic

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a
generic

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd
generic

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c
generic

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd
generic

rxrpc: only handle RESPONSE during service challenge - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e

Vendor Advisories for CVE-2026-31676(2)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-35.35) @ questing2026-06-14ubuntu
ubuntulinux-virtual-6.8 (6.8.0-124.124) @ noble2026-06-14ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1018.19) @ questing2026-06-14ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-06-14ubuntu

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.

Additional Vendor Advisories

(4)

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 10× in last 7d / 43× 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 171 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
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  5. 2026-07-13 22:30 UTCEPSS rescore
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  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
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  15. 2026-07-06 02:23 UTCEPSS rescore
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  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. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-27 03:08 UTCEPSS rescore
  3. 2026-06-25 13:49 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
  5. 2026-06-24 14:05 UTCEPSS rescore
  6. 2026-06-23 21:33 UTCEPSS rescore
  7. 2026-06-23 21:33 UTCEPSS rescore
  8. 2026-06-22 14:25 UTCEPSS rescore
  9. 2026-06-22 14:25 UTCEPSS rescore
  10. 2026-06-21 14:56 UTCEPSS rescore
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  12. 2026-06-21 01:59 UTCEPSS rescore
  13. 2026-06-19 19:25 UTCEPSS rescore
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  18. 2026-06-16 17:52 UTCEPSS rescore
  19. 2026-06-15 17:49 UTCEPSS rescore
  20. 2026-06-14 23:18 UTCEPSS rescore
  21. 2026-06-14 23:08 UTCEG score recompute
  22. 2026-06-14 23:08 UTCVendor advisory
  23. 2026-06-14 23:08 UTCGHSA enrichment
  24. 2026-06-14 11:31 UTCEG score recompute
  25. 2026-06-14 11:31 UTCVendor advisory
  26. 2026-06-14 11:30 UTCGHSA enrichment
  27. 2026-06-13 23:00 UTCEPSS rescore
  28. 2026-06-12 23:12 UTCEPSS rescore
  29. 2026-06-12 23:12 UTCEPSS rescore
  30. 2026-06-12 12:15 UTCEG score recompute
  31. 2026-06-12 12:15 UTCVendor advisory
  32. 2026-06-12 12:15 UTCGHSA enrichment
  33. 2026-06-11 23:37 UTCEG score recompute
  34. 2026-06-11 23:37 UTCVendor advisory
  35. 2026-06-11 23:37 UTCGHSA enrichment
  36. 2026-06-11 14:00 UTCEPSS rescore
  37. 2026-06-11 12:03 UTCEG score recompute
  38. 2026-06-11 12:03 UTCVendor advisory
  39. 2026-06-11 12:03 UTCGHSA enrichment
  40. 2026-06-10 23:04 UTCEG score recompute
  41. 2026-06-10 23:04 UTCVendor advisory
  42. 2026-06-10 23:03 UTCGHSA enrichment
  43. 2026-06-10 22:18 UTCEPSS rescore
  44. 2026-06-10 13:22 UTCEPSS rescore
  45. 2026-06-10 11:28 UTCEG score recompute
  46. 2026-06-10 11:28 UTCVendor advisory
  47. 2026-06-10 11:28 UTCGHSA enrichment
  48. 2026-06-09 23:54 UTCEG score recompute
  49. 2026-06-09 23:54 UTCVendor advisory
  50. 2026-06-09 23:54 UTCGHSA enrichment
  51. 2026-06-09 12:20 UTCEG score recompute
  52. 2026-06-09 12:20 UTCVendor advisory
  53. 2026-06-09 12:20 UTCGHSA enrichment
  54. 2026-06-09 00:18 UTCEG score recompute
  55. 2026-06-09 00:18 UTCVendor advisory
  56. 2026-06-09 00:18 UTCGHSA enrichment
  57. 2026-06-08 14:17 UTCEPSS rescore
  58. 2026-06-08 14:17 UTCEPSS rescore
  59. 2026-06-08 09:09 UTCEG score recompute
  60. 2026-06-08 09:09 UTCVendor advisory
  61. 2026-06-08 09:09 UTCGHSA enrichment
  62. 2026-06-07 21:35 UTCEG score recompute
  63. 2026-06-07 21:35 UTCVendor advisory
  64. 2026-06-07 21:35 UTCGHSA enrichment
  65. 2026-06-07 15:25 UTCEPSS rescore
  66. 2026-06-07 15:25 UTCEPSS rescore
  67. 2026-06-07 15:25 UTCEPSS rescore
  68. 2026-06-07 10:01 UTCEG score recompute
  69. 2026-06-07 10:01 UTCVendor advisory
  70. 2026-06-07 10:00 UTCGHSA enrichment
  71. 2026-06-06 22:16 UTCEG score recompute
  72. 2026-06-06 22:16 UTCVendor advisory
  73. 2026-06-06 22:16 UTCGHSA enrichment
  74. 2026-06-06 13:47 UTCEPSS rescore
  75. 2026-06-06 13:47 UTCEPSS rescore

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-31676?
CVE-2026-31676 is a high vulnerability published on April 25, 2026. In the Linux kernel, the following vulnerability has been resolved: rxrpc: only handle RESPONSE during service challenge Only process RESPONSE packets while the service connection is still in RXRPCCONNSERVICECHALLENGING. Check that state under statelock before running response verification and…
When was CVE-2026-31676 disclosed?
CVE-2026-31676 was first published in the National Vulnerability Database on April 25, 2026, with the most recent update on June 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31676 actively exploited?
CVE-2026-31676 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31676?
CVE-2026-31676 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-31676?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31676, 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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