SB2026022821 - Local denial of service in OpenBSD
Published: February 28, 2026
Security Bulletin ID
SB2026022821
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: N/A)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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 perform a denial of service attack.
The vulnerability exists due to a race condition when blocking sysctl requests by pledge(2). A local user can exploit the race and perform a denial of service attack.
Remediation
Install update from vendor's website.