CVE-2026-74340

HIGHPre-NVD 8.18.1
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: 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 firmware count in PRINT_REG_INFO indication

The firmware-controlled rsp->count field is used as the loop bound for indexing into the flexible rsp->regs[] array without validation against the message length. A count exceeding the actual data causes out-of- bounds reads from the heap-allocated message buffer.

Add a check that count fits within the received message.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (8)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f987efff29a5fe45320ea5991c9d5cb98b676953
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f03782f7f41f2afee5076a1ef08ced5649218771
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/df2187acfca6c6cca372c5d35f42394d9c270b09
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/64228dfc4247aca178c01e5a37af7d8dcc7a6089
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3cf92b44c4fb88a5e8de8733a4494c0956606bca
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/23d210877968657bd07e1a517e0b516db20a1d80
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/22b0b8572a64362531dd0ed499b75e16282aeb2b
generic

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0907c06dccae9e3c8d5a68eb9014beec73a36e79

Vendor Advisories for CVE-2026-74340(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 31× in last 7d / 31× 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. 2026-08-21 02:52 UTCEG score recompute
  2. 2026-08-21 02:52 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 15:29 UTCGHSA enrichment
  5. 2026-08-20 04:05 UTCEG score recompute
  6. 2026-08-20 04:05 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 16:41 UTCGHSA enrichment
  9. 2026-08-19 05:16 UTCGHSA enrichment
  10. 2026-08-18 17:49 UTCEG score recompute
  11. 2026-08-18 17:49 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 06:20 UTCGHSA enrichment
  15. 2026-08-17 18:58 UTCEG score recompute
  16. 2026-08-17 18:57 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 06:26 UTCEG score recompute
  19. 2026-08-17 06:26 UTCGHSA enrichment
  20. 2026-08-17 05:56 UTCEG score recompute 8.10
  21. 2026-08-17 05:56 UTCGHSA enrichment
  22. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 8.1 · severity → HIGH
  23. 2026-08-17 05:26 UTCEG score recompute
  24. 2026-08-17 05:26 UTCGHSA enrichment
  25. 2026-08-17 05:24 UTCMITRE cvelistV5
Show 6 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-16 02:15 UTCEPSS rescore
  4. 2026-08-15 06:23 UTCNVD update
  5. 2026-08-15 06:15 UTCEG score recompute
  6. 2026-08-15 06:12 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74340?
CVE-2026-74340 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix OOB read from firmware count in PRINTREGINFO indication The firmware-controlled rsp->count field is used as the loop bound for indexing into the flexible rsp->regs[] array without validation against the message…
When was CVE-2026-74340 disclosed?
CVE-2026-74340 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74340 actively exploited?
CVE-2026-74340 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 79.7% of all scored CVEs.
What is the CVSS score of CVE-2026-74340?
CVE-2026-74340 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-74340?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74340, 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

Explore the affected products and dependency analysis for CVE-2026-74340

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