SB2026081536 - Integer overflow in Linux kernel realtek rtw89 driver
Published: August 15, 2026
Security Bulletin ID
SB2026081536
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer overflow (CVE-ID: CVE-2026-74411)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/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 an integer truncation in rtw89_update_6ghz_rnr_chan when processing 6 GHz scan parameters. A local user can trigger Wi-Fi scanning with a large number of 6 GHz parameters to cause a denial of service.
The issue can result in a kernel soft lockup during 6 GHz Wi-Fi scanning and may lead to a system panic.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/05d46e30303275f21f13c951166d39c85df976d4
- https://git.kernel.org/stable/c/08fdcb529df6df3562dd2b0035f88dd5be8b3c68
- https://git.kernel.org/stable/c/140fa699cfd0e18ab2f1497acd951fb3548610f5
- https://git.kernel.org/stable/c/7a1ab5fdcae896e20ca6d68fa0fbd2816cb7471f
- https://git.kernel.org/stable/c/966fbed4b4463fbcb49c5becf3f86eae776861bd