SB2026020518 - NULL pointer dereference in Linux kernel wireless virtual driver
Published: February 5, 2026
Security Bulletin ID
SB2026020518
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 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-23040)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the mac80211_hwsim_nan_dw_start() function in drivers/net/wireless/virtual/mac80211_hwsim.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.