Use-after-free in Linux kernel - CVE-2026-98330

Vulnerability identifier: #VU153693

CSH Severity: Low

CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98330

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use-after-free in the cfg80211 network namespace teardown logic when destroying a network namespace after a wireless interface fails to move to the initial namespace. A local user can trigger teardown of a network namespace containing a wiphy under these conditions to cause a denial of service.

An allocation failure can prevent interface migration. The resulting kernel fault can occur during wiphy unregistration.

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/4635b1a1c1d693178a537446a6e09963f0fdae52
• https://git.kernel.org/stable/c/b949b2720688691f1e41bdbfbe3df2b6dc77c34d
• https://git.kernel.org/stable/c/caa02072b2986d4b0e7a824de05782ef7b03a0ba

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