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Review reviewHigh

CVE-2026-46136

Linux Linux, linux kernel

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.

CVSS
7.8
EPSS
0.13%
2.97% percentile
CISA KEV
Not listed
Published
2026.05.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

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 product and versions

Product
Linux Linux, linux kernel
Affected versions
0c9318d49e501a5d50b02bd91a4813bde2353488, 15173a1697236793e9e900b82fece6f99d41b2a7, fa6ad88e023ddfa6c5dcdb466d159e89f451e305, 5c8cac512844ad593d31258e215908014381bee2, 6.1.75, 6.6.14, 6.7.2, 6.8, >= 6.1.75 < 6.1.175, >= 6.6.14 < 6.6.140, >= 6.7.2 < 6.12.88, >= 6.13 < 6.18.30, >= 6.19 < 7.0.7
Fixed versions
6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787