Use-after-free in Linux kernel - CVE-2026-90368

Vulnerability identifier: #VU151124

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-2026-90368

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to dereference a stale monitor_vif pointer.

The vulnerability exists due to use-after-free in mt7915_add_interface() when mt76_wcid_alloc() fails during interface addition. A local user can trigger a failed interface addition to dereference a stale monitor_vif pointer.

mac80211 does not call remove_interface() when interface addition fails.

Linux kernel
Debian Linux
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)
linux (Debian package)

Install security update from vendor's repository.

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
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/218fdf0fcb796b8d281dbdd4a6144c5a8fc7fd0f
• https://git.kernel.org/stable/c/2fb6480c52f611338e1b0abe5e6219be1fc9ab75
• https://git.kernel.org/stable/c/507eddb8175a67df5086354b92d6a4fd7f6f1f96
• https://git.kernel.org/stable/c/71bf9de2ab3fb2c54bedb0b4c9b468d2e1d55280

• Use-after-free in Linux kernel mt76 mt7915 driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more