wifi: mt76: mt7921: fix a potential clc buffer length underflow
Published May 28, 2026
7.8
HIGHCVSS 3.1
EPSS 0.18%
Description
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
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 6.1.75StatusaffectedConstraints<6.1.175
- Version 6.6.14StatusaffectedConstraints<6.6.140
- Version 6.7.2StatusaffectedConstraints<6.8
- Version
-
- Version 6.8StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.8
- Version 6.1.175StatusunaffectedConstraints<=6.1.*
- Version 6.12.88StatusunaffectedConstraints<=6.12.*
- Version 6.18.30StatusunaffectedConstraints<=6.18.*
- Version 6.6.140StatusunaffectedConstraints<=6.6.*
- Version 7.0.7StatusunaffectedConstraints<=7.0.*
- Version 7.1StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
| |||||||||||||||||||||||||||
| Linux | Linux | unaffected |
| |||||||||||||||||||||||||||
| Linux | Linux | affected |
|
- ≥ 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
No data.
Red Hat Enterprise Linux 10
kernel
Fix deferred
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Fix deferred
Red Hat Enterprise Linux 9
kernel-rt
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (11)
- https://access.redhat.com/security/cve/CVE-2026-46136 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2482624 Issue Tracking
- 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 Patch
- https://lore.kernel.org/linux-cve-announce/2026052818-CVE-2026-46136-ae9a@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-46136
- https://www.cve.org/CVERecord?id=CVE-2026-46136
Change history (0)
No recorded changes yet.