What’s Vulnerable › Vulnerabilities

CVE-2026-46136: wifi: mt76: mt7921: fix a potential clc buffer length underflow

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-10-15
• Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: fix a potential clc buffer length underflow The buf_len is used to limit the iterations for retrieving the country power setting and may underflow under certain conditions due to changes in the power table in CLC. This underflow leads to an almost infinite loop or an invalid power setting resulting in driver initialization failure.

Affected products

• Linux kernel: from 6.1.75 before 6.1.175; from 6.6.14 before 6.6.140; from 6.7.2 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7 — fixed in 6.1.175, 6.12.88, 6.18.30, 6.6.140, 7.0.7

How to fix

Upgrade to a fixed version: Linux kernel 6.1.175, 6.12.88, 6.18.30, 6.6.140. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0aa63d33742b805d1a218d18d12b983cce4b2f7b
• https://git.kernel.org/stable/c/2a79b1a492bcfa725383b6580cd93a6862308c85
• https://git.kernel.org/stable/c/5373f8b19e568b5c217832b9bbef165bd2b2df14
• https://git.kernel.org/stable/c/90cc573fd2f46ddbc2c329e7814b5ba3deb7b939
• https://git.kernel.org/stable/c/a0111847f0b4f6023f6dd320114697514e024ba3
• https://git.kernel.org/stable/c/e451c325b000b9a0081fd93bc6d103d6943d4b55
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Get alerted when CVE-2026-46136 or the next vulnerability affects your stack