CVE-2026-64515

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 5 sources updated 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

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:

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

July 27, 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(1)

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 15× in last 7d / 15× 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.

  1. 2026-07-27 14:14 UTCEPSS rescore
  2. 2026-07-27 05:26 UTCEG score recompute
  3. 2026-07-27 05:26 UTCGHSA enrichment
  4. 2026-07-27 05:13 UTCEG score recompute▲ 8.30
  5. 2026-07-27 05:13 UTCGHSA enrichment
  6. 2026-07-27 05:12 UTCMITRE cvelistV5CVSS v3 → 8.3 · severity → HIGH
  7. 2026-07-26 14:54 UTCEPSS rescore
  8. 2026-07-26 14:54 UTCEPSS rescore
  9. 2026-07-26 02:45 UTCEG score recompute
  10. 2026-07-26 02:45 UTCGHSA enrichment
  11. 2026-07-25 14:18 UTCEPSS rescore
  12. 2026-07-25 14:18 UTCEPSS rescore
  13. 2026-07-25 10:39 UTCNVD update
  14. 2026-07-25 09:22 UTCEG score recompute
  15. 2026-07-25 09:21 UTCMITRE cvelistV5first tracked

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 July 27, 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 85.1% of all scored CVEs.
What is the CVSS score of CVE-2026-64515?
CVE-2026-64515 has a CVSS v3 base score of 8.3 (NVD).
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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