CVE-2026-80635

HIGHPre-NVD 8.88.8
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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: wcn36xx: fix OOB read from short trigger BA firmware response

The firmware response length is only checked against sizeof(*rsp) (20 bytes), but when candidate_cnt >= 1, a 22-byte candidate struct is read at buf + 20 without verifying the response contains it. This causes an out-of-bounds read of stale heap data, corrupting the BA session state.

Add validation that the response includes the candidate data.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 29, 2026

Advisory Details (6)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

wifi: wcn36xx: fix OOB read from short trigger BA firmware response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b5e6f21923ca89d90256e7346301056f6502691e
generic

wifi: wcn36xx: fix OOB read from short trigger BA firmware response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0cafe6ed8d1f6d0097eda31d85f5760d4f359c2
generic

wifi: wcn36xx: fix OOB read from short trigger BA firmware response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/af8f0ea1f0a3a5fb5ed2b8fed3f1501d644597ee
generic

wifi: wcn36xx: fix OOB read from short trigger BA firmware response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0b57bcd0dac6e2c9a3e474ec280e7db0b3edf35
generic

wifi: wcn36xx: fix OOB read from short trigger BA firmware response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c07aa0534d50361183833e3803204044cf1d0476
generic

wifi: wcn36xx: fix OOB read from short trigger BA firmware response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/04aba50212f9f274e1a726fb3873b5ce8da2d821

Vendor Advisories for CVE-2026-80635(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 12× in last 7d / 12× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 20:27 UTCEG score recompute
  3. 2026-08-29 20:27 UTCGHSA enrichment
  4. 2026-08-29 07:26 UTCEG score recompute
  5. 2026-08-29 07:26 UTCGHSA enrichment
  6. 2026-08-29 06:37 UTCEG score recompute 8.80
  7. 2026-08-29 06:36 UTCGHSA enrichment
  8. 2026-08-29 06:33 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  9. 2026-08-28 21:42 UTCEPSS rescore
  10. 2026-08-28 08:20 UTCNVD update
  11. 2026-08-28 07:34 UTCEG score recompute
  12. 2026-08-28 07:32 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-80635?
CVE-2026-80635 is a high vulnerability published on August 28, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix OOB read from short trigger BA firmware response The firmware response length is only checked against sizeof(*rsp) (20 bytes), but when candidate_cnt >= 1, a 22-byte candidate struct is read at buf + 20 without…
When was CVE-2026-80635 disclosed?
CVE-2026-80635 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80635 actively exploited?
CVE-2026-80635 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 82.6% of all scored CVEs.
What is the CVSS score of CVE-2026-80635?
CVE-2026-80635 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-80635?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80635, 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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