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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mt7921中clc缓冲区长度可能下溢，可能导致无限循环或驱动初始化失败。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0c9318d49e501a5d50b02bd91a4813bde2353488< 2a79b1a492bcfa725383b6580cd93a6862308c85 affected
15173a1697236793e9e900b82fece6f99d41b2a7< e451c325b000b9a0081fd93bc6d103d6943d4b55 affected
fa6ad88e023ddfa6c5dcdb466d159e89f451e305< 90cc573fd2f46ddbc2c329e7814b5ba3deb7b939 affected
fa6ad88e023ddfa6c5dcdb466d159e89f451e305< 0aa63d33742b805d1a218d18d12b983cce4b2f7b affected
fa6ad88e023ddfa6c5dcdb466d159e89f451e305< a0111847f0b4f6023f6dd320114697514e024ba3 affected
fa6ad88e023ddfa6c5dcdb466d159e89f451e305< 5373f8b19e568b5c217832b9bbef165bd2b2df14 affected
5c8cac512844ad593d31258e215908014381bee2 affected
6.1.75< 6.1.175 affected
… +10 more rows
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I. Basic Information for CVE-2026-46136

Vulnerability Information
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Vulnerability Title
wifi: mt76: mt7921: fix a potential clc buffer length underflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mt7921中clc缓冲区长度可能下溢，可能导致无限循环或驱动初始化失败。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0c9318d49e501a5d50b02bd91a4813bde2353488 ~ 2a79b1a492bcfa725383b6580cd93a6862308c85 -
Linux Linux 6.8 -

II. Public POCs for CVE-2026-46136

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III. Intelligence Information for CVE-2026-46136

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Patches & Fixes for CVE-2026-46136 (6)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
CVE-2026-46227 7.8 HIGH sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL
CVE-2026-46173 7.8 HIGH exit: prevent preemption of oopsing TASK_DEAD task

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46136

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