Out-of-bounds read in Linux kernel - CVE-2026-90350

Vulnerability identifier: #VU151138

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90350

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform an out-of-bounds read.

The vulnerability exists due to an out-of-bounds read in mt76_vif_link() when processing an out-of-range link ID. A local user can cause processing of an out-of-range link ID to perform an out-of-bounds read.

The issue occurs before the first link has been added, when the default link ID is IEEE80211_LINK_UNSPECIFIED (0xf).

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/13f6a9c786022d5213e84d494cc8717c378f5395
• https://git.kernel.org/stable/c/9ba744a28c26eaa5cae930688a22e01888395308
• https://git.kernel.org/stable/c/c1442c345ca8da857fadea1d0797b97347ab6984

• Out-of-bounds read in Linux kernel mediatek mt76 driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more