Skip to main content

Linux Kernel CVE-2026-80635

| EUVDEUVD-2026-67511 HIGH
2026-08-28 Linux GHSA-5gcp-mjqf-m8mf
Buffer Overflow Linux Red Hat Suse
8.8
CVSS 3.1 · Vendor: Linux
Share

Severity by source

Vendor (Linux) PRIMARY
8.8 HIGH
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.1 HIGH

Adjacent WiFi-range, no auth; OOB read primarily causes availability impact via session corruption and limited heap disclosure, not full integrity compromise.

3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
6.6 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Aug 29, 2026 - 07:41 vuln.today
CVSS changed
Aug 29, 2026 - 07:22 NVD
8.8 (HIGH)
Patch available
Aug 28, 2026 - 09:02 EUVD
CVE Published
Aug 28, 2026 - 06:48 cve.org
HIGH 8.8
CVE Published
Aug 28, 2026 - 06:48 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

Out-of-bounds heap read in the Linux kernel's wcn36xx WiFi driver allows an adjacent-network attacker to corrupt Block Acknowledgment session state by sending crafted 802.11 frames that elicit a short firmware response. Kernels from 4.7 through pre-patch stable branches on devices equipped with Qualcomm WCN3660/WCN3620/WCN3680 WiFi hardware are affected. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Persist
technique details hidden
Impact
technique details hidden
Sign in to reveal

Vulnerability AssessmentAI

Exploitation The target must be running an unpatched Linux kernel from 4.7 onward with the wcn36xx driver loaded - meaning the device must physically contain a Qualcomm WCN3660, WCN3620, or WCN3680 WiFi chipset and have that driver active. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The NVD-assigned CVSS 3.1 score of 8.8 (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) places this as high-severity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary fix is upgrading to a patched kernel: 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, or 7.2 depending on the active stable branch, with fix commits available at https://git.kernel.org/stable/c/04aba50212f9f274e1a726fb3873b5ce8da2d821 and sibling stable refs for manual backporting. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours, identify and inventory all Linux systems using Qualcomm WCN3660, WCN3620, or WCN3680 WiFi hardware running kernel versions 4.7 through current stable branches. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

Same technique Buffer Overflow

View all
CVE-2017-7269 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2020-0796 CRITICAL POC
10.0
CVE-2019-11043 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 16.0 Not-Affected

Share

CVE-2026-80635 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy