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Vulnerability · Published May 28, 2026 · Assigned by Linux

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

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.1%top 97.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.176-1DEBIAN-CVE-2026-46136
Debian:13linux6.12.88-1DEBIAN-CVE-2026-46136
Debian:14linux7.0.7-1DEBIAN-CVE-2026-46136
Ubuntu:24.04:LTSlinux6.8.0-136.136UBUNTU-CVE-2026-46136
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-aws6.8.0-1061.64UBUNTU-CVE-2026-46136
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1061.64~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure6.8.0-1063.71UBUNTU-CVE-2026-46136
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1063.71~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1062.69UBUNTU-CVE-2026-46136
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1062.69~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-gcp6.8.0-1064.72UBUNTU-CVE-2026-46136
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1064.72~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-gke6.8.0-1059.67UBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1046.50UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-136.136~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-ibm6.8.0-1061.62UBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1061.62~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-136.136.2UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-136.136.2~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1059.62UBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1059.62~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1059.62.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1030.31UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oracle6.8.0-1058.61UBUNTU-CVE-2026-46136
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1058.61~22.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-raspi6.8.0-1061.65UBUNTU-CVE-2026-46136
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46136
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46136
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-46136
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-136.136~22.04.3UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-46136
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-46136
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1033.34UBUNTU-CVE-2026-46136

Affected products (as reported)

VendorProductVersions
Linux Linux 0c9318d49e501a5d50b02bd91a4813bde2353488 – before 2a79b1a492bcfa725383b6580cd93a6862308c8515173a1697236793e9e900b82fece6f99d41b2a7 – before e451c325b000b9a0081fd93bc6d103d6943d4b55fa6ad88e023ddfa6c5dcdb466d159e89f451e305 – before 90cc573fd2f46ddbc2c329e7814b5ba3deb7b939fa6ad88e023ddfa6c5dcdb466d159e89f451e305 – before 0aa63d33742b805d1a218d18d12b983cce4b2f7bfa6ad88e023ddfa6c5dcdb466d159e89f451e305 – before a0111847f0b4f6023f6dd320114697514e024ba3fa6ad88e023ddfa6c5dcdb466d159e89f451e305 – before 5373f8b19e568b5c217832b9bbef165bd2b2df145c8cac512844ad593d31258e215908014381bee26.1.75 – before 6.1.175
Linux Linux 6.8

References