Use-after-free in Linux kernel - CVE-2026-90343

Vulnerability identifier: #VU151148

CSH Severity: Low

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

CVE-ID: CVE-2026-90343

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local privileged user to trigger a use-after-free condition.

The vulnerability exists due to use-after-free in cfg80211 PMSR request teardown when stopping a P2P device or NAN interface with a pending PMSR request. A local privileged user can stop a P2P device or NAN interface while a PMSR request is pending to trigger a use-after-free condition.

The stale request can be used when the driver later reports a result.

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 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
linux (Debian package) - update to 6.12.115-2

• https://git.kernel.org/stable/c/6c5fc504d0d6934132637aa3db4b9b58148eaa78
• https://git.kernel.org/stable/c/7a22cbc6c6bdd3c3811b4ce13875685c520f94de
• https://git.kernel.org/stable/c/db3439ad11ac5e52decdefe784c98b21c3757848

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