wifi: mt76: mt7921: fix a potential clc buffer length underflow
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.
CVE-2026-46136
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46136
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "0c9318d49e501a5d50b02bd91a4813bde2353488",
"lessThan": "2a79b1a492bcfa725383b6580cd93a6862308c85",
"versionType": "git"
},
{
"status": "affected",
"version": "15173a1697236793e9e900b82fece6f99d41b2a7",
"lessThan": "e451c325b000b9a0081fd93bc6d103d6943d4b55",
"versionType": "git"
},
{
"status": "affected",
"version": "fa6ad88e023ddfa6c5dcdb466d159e89f451e305",
"lessThan": "90cc573fd2f46ddbc2c329e7814b5ba3deb7b939",
"versionType": "git"
},
{
"status": "affected",
"version": "fa6ad88e023ddfa6c5dcdb466d159e89f451e305",
"lessThan": "0aa63d33742b805d1a218d18d12b983cce4b2f7b",
"versionType": "git"
},
{
"status": "affected",
"version": "fa6ad88e023ddfa6c5dcdb466d159e89f451e305",
"lessThan": "a0111847f0b4f6023f6dd320114697514e024ba3",
"versionType": "git"
},
{
"status": "affected",
"version": "fa6ad88e023ddfa6c5dcdb466d159e89f451e305",
"lessThan": "5373f8b19e568b5c217832b9bbef165bd2b2df14",
"versionType": "git"
},
{
"status": "affected",
"version": "5c8cac512844ad593d31258e215908014381bee2",
"versionType": "git"
},
{
"status": "affected",
"version": "6.1.75",
"lessThan": "6.1.175",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.14",
"lessThan": "6.6.140",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.7.2",
"lessThan": "6.8",
"versionType": "semver"
}
],
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7921/mcu.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.88",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7921/mcu.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46136
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28394 · Revision 1
- Added to Heist Feed
- Publisher date