SB2026032578 - Improper Synchronization in Linux kernel wireless rsi driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Synchronization (CVE-ID: CVE-2026-23373)

CWE-ID: CWE-662 - Improper Synchronization

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to improper return value handling in the rsi_mac80211_config function within the RSI Wi-Fi driver when configuring 802.11 hardware. A local user can trigger a misconfigured hardware initialization to cause a denial of service.

The issue arises because the driver defaults to returning -EOPNOTSUPP instead of 0 during configuration, which triggers a WARN_ON in ieee80211_hw_conf_init, leading to disruptive behavior.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/67d10e8db57ffc21f8177e9e884bbc743fdc0bae
• https://git.kernel.org/stable/c/95ed07644b2c6119f706484b87b7f43e6133f3b5
• https://git.kernel.org/stable/c/b64fbd718cf42feb75502bf25d0d16eb671aea45
• https://git.kernel.org/stable/c/d973b1039ccde6b241b438d53297edce4de45b5c