SB2026091322 - Improper control of a resource through its lifetime in Linux kernel realtek rtw89 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-80939)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to improper resource shutdown in the rtw89 PCI driver's rfkill polling handler when the system performs a warm reboot. A local privileged user can initiate a warm reboot to cause a denial of service.

The issue occurs on arm64 platforms after the PCIe link has been torn down.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/667c12782aaf8dd3cb2213e528fe63a73cb63345
• https://git.kernel.org/stable/c/c1f214dd1351244156deb57761b14190a233aef6