CVE-2026-74341

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response

The firmware response dispatcher copies all synchronous HAL responses into the 4096-byte hal_buf without validating the response length. A response exceeding WCN36XX_HAL_BUF_SIZE causes a heap buffer overflow with firmware-controlled content.

Add a bounds check on the response length.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-19). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (6)

Auto-updated Aug 17, 2026
Patch available.
Web page

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dae9cadf0925f1cbfb71306d60490890df3870a6
Web page

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92
Web page

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/88a240d86d3d64521f9194abe185ac71cc74d0bd
Web page

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18
Web page

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/18813b90032bfaafb225906a4d2b51be4dfc02c3
Web page

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/15545ee71301e82d26d9a31b407ed0019eb62a60

Vendor Advisories for CVE-2026-74341(1)

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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-azure-lts-26.04 (7.0.0-1017.17) @ resolute2026-10-06ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1015.15) @ resolute2026-10-06ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-38.38) @ resolute2026-10-06ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1036.39) @ noble2026-10-06ubuntu

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)
  • every version up to 6.1.180-1: fixed in 6.1.180-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)
  • every version up to 6.12.100-1: fixed in 6.12.100-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 76× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 221 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 122 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 17:10 UTCEG score recompute
  2. 2026-10-19 17:09 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  3. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-18 03:14 UTCEG score recompute
  6. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-13 07:38 UTCEG score recompute
  12. 2026-10-13 07:38 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  13. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-12 15:40 UTCEG score recompute
  15. 2026-10-11 19:26 UTCEG score recompute
  16. 2026-10-11 16:41 UTCEG score recompute
  17. 2026-10-11 14:00 UTCEG score recompute
  18. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-10-06 22:26 UTCEG score recompute
  24. 2026-10-06 22:26 UTCVendor advisory
  25. 2026-10-06 22:26 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
Show 74 more
  1. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-06 09:11 UTCEG score recompute
  3. 2026-10-06 09:11 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  4. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-05 09:41 UTCEG score recompute
  6. 2026-10-05 09:41 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  7. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-04 21:58 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  9. 2026-10-04 06:48 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  10. 2026-10-03 19:31 UTCEG score recompute
  11. 2026-10-03 19:31 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-02 18:22 UTCEG score recompute
  14. 2026-10-02 18:22 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  15. 2026-10-02 07:04 UTCEG score recompute
  16. 2026-10-02 07:04 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-01 08:17 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  19. 2026-09-30 20:59 UTCEG score recompute
  20. 2026-09-30 20:59 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  21. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-09-29 00:02 UTCEG score recompute
  23. 2026-09-29 00:02 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  24. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-09-28 10:15 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  26. 2026-09-27 22:46 UTCEG score recompute
  27. 2026-09-27 22:46 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  28. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  29. 2026-09-27 08:28 UTCEG score recompute
  30. 2026-09-27 08:28 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  31. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  32. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  33. 2026-09-25 02:33 UTCEG score recompute
  34. 2026-09-25 02:33 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  35. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  36. 2026-09-24 08:01 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  37. 2026-09-23 20:32 UTCEG score recompute
  38. 2026-09-23 20:32 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  39. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  40. 2026-09-23 08:05 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  41. 2026-09-22 20:47 UTCEG score recompute
  42. 2026-09-22 20:47 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  43. 2026-09-22 07:49 UTCEG score recompute
  44. 2026-09-22 07:49 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  45. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  46. 2026-09-21 20:31 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  47. 2026-09-21 09:10 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  48. 2026-09-20 21:35 UTCEG score recompute
  49. 2026-09-20 21:35 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  50. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  51. 2026-09-20 10:18 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  52. 2026-09-19 23:00 UTCEG score recompute
  53. 2026-09-19 23:00 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  54. 2026-09-19 11:03 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  55. 2026-09-18 22:57 UTCEG score recompute
  56. 2026-09-18 22:57 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  57. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  58. 2026-09-18 11:40 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  59. 2026-09-18 00:20 UTCEG score recompute
  60. 2026-09-18 00:20 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  61. 2026-09-17 11:12 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  62. 2026-09-16 23:31 UTCEG score recompute
  63. 2026-09-16 23:31 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  64. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  65. 2026-09-16 06:37 UTCEG score recompute
  66. 2026-09-16 06:37 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  67. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  68. 2026-09-15 19:20 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  69. 2026-09-15 07:50 UTCEG score recompute
  70. 2026-09-15 07:50 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  71. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  72. 2026-09-14 20:33 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8
  73. 2026-09-14 09:15 UTCEG score recompute
  74. 2026-09-14 09:15 UTCGHSA enrichmentGHSA-8q74-796q-49pm · GitHub severity HIGH · GitHub CVSS 8.8

Frequently asked(5)

What is CVE-2026-74341?
CVE-2026-74341 is a high-severity vulnerability; its CVE record was published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix heap overflow from oversized firmware HAL response The firmware response dispatcher copies all synchronous HAL responses into the 4096-byte hal_buf without validating the response length. A response exceeding…
When was the CVE record for CVE-2026-74341 published?
The CVE record for CVE-2026-74341 was published on August 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 17, 2026; the record at its source may have been updated since.
Is CVE-2026-74341 actively exploited?
CVE-2026-74341 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74341?
CVE-2026-74341 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74341?
A fix for CVE-2026-74341 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74341 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-74341

Explore →

Is Your Infrastructure Affected by CVE-2026-74341?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.