SB2026100738 - Use-after-free in Linux kernel wireless

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98330)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

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