CVE-2026-64515

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. the CNA's CVSS baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — Patch released this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: None knownExposed: 0

A fix is available — apply it.

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

wifi: mac80211: fix MLE defragmentation

If either reconf or EPCS multi-link element (MLE) is contained in a non-transmitted profile, the defragmentation routine is called with a pointer to the defragmented copy, but the original elements.

This is incorrect for two reasons:

  • if the original defragmentation was needed, it will not find the
correct data
  • if the original frame is at a higher address, the parsing will
potentially overrun the heap data (though given the layout of the buffers, only into the new defragmentation buffer, and then it has to stop and fail once that's filled with copied data.

Fix it by tracking the container along with the pointer and in doing so also unify the two almost identical defragmentation routines.

CVSS v3
8.3
EG Score
8.3(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity83% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 5, 2026

Advisory Details (4)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

wifi: mac80211: fix MLE defragmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a74e893f30db64cdce0fc7a96d3baa417bcd55f5
generic

wifi: mac80211: fix MLE defragmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/722b3f86df80644463d29fe5451e30a617f74500
generic

wifi: mac80211: fix MLE defragmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/55c479aae99b120489a432db9c717484e523dfd6
generic

wifi: mac80211: fix MLE defragmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4

Vendor Advisories for CVE-2026-64515(3)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-19ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-19ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-19ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-19ubuntu
redhatkernel-0:5.14.0-687.47.1.el9_82026-09-14redhat
redhatkernel-0:6.12.0-211.53.1.el10_22026-09-08redhat

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)7.0.12-1—

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 32× in last 7d / 126× 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 275 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64515?
CVE-2026-64515 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix MLE defragmentation If either reconf or EPCS multi-link element (MLE) is contained in a non-transmitted profile, the defragmentation routine is called with a pointer to the defragmented copy, but the original…
When was CVE-2026-64515 disclosed?
CVE-2026-64515 was first published in the National Vulnerability Database on July 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-2026-64515 actively exploited?
CVE-2026-64515 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 85.2% of all scored CVEs.
What is the CVSS score of CVE-2026-64515?
CVE-2026-64515 has a CVSS v4.0 base score of 8.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-64515?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64515, 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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