High severity · published May 28, 2026
CVE-2026-46136
wifi: mt76: mt7921: fix a potential clc buffer length underflow
7.8
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
6.1.75 before 6.1.175; 6.6.14 before 6.6.140; 6.7.2 before 6.12.88; 6.13 before 6.18.30; 6.19 before 7.0.7 · source: NVD
LI
Linux · Linux
0c9318d49e501a5d50b02bd91a4813bde2353488 before 2a79b1a492bcfa725383b6580cd93a6862308c85; 15173a1697236793e9e900b82fece6f99d41b2a7 before e451c325b000b9a0081fd93bc6d103d6943d4b55; fa6ad88e023ddfa6c5dcdb466d159e89f451e305 before 90cc573fd2f46ddbc2c329e7814b5ba3deb7b939; fa6ad88e023ddfa6c5dcdb466d159e89f451e305 before 0aa63d33742b805d1a218d18d12b983cce4b2f7b; fa6ad88e023ddfa6c5dcdb466d159e89f451e305 before a0111847f0b4f6023f6dd320114697514e024ba3; fa6ad88e023ddfa6c5dcdb466d159e89f451e305 before 5373f8b19e568b5c217832b9bbef165bd2b2df14; +5 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46136
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46136
Patch
https://git.kernel.org/stable/c/0aa63d33742b805d1a218d18d12b983cce4b2f7b
Patch
https://git.kernel.org/stable/c/2a79b1a492bcfa725383b6580cd93a6862308c85
Patch
https://git.kernel.org/stable/c/5373f8b19e568b5c217832b9bbef165bd2b2df14
Patch
https://git.kernel.org/stable/c/90cc573fd2f46ddbc2c329e7814b5ba3deb7b939
Patch
https://git.kernel.org/stable/c/a0111847f0b4f6023f6dd320114697514e024ba3
Patch
https://git.kernel.org/stable/c/e451c325b000b9a0081fd93bc6d103d6943d4b55
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