SB2026090519 - Denial of service in p11-kit
Published: September 5, 2026
Security Bulletin ID
SB2026090519
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) Heap-based buffer overflow (CVE-ID: CVE-2026-18938)
CWE-ID: CWE-122 - Heap-based Buffer 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 a heap-based buffer overflow in the p11-kit RPC parsing process when processing nested attributes in specially crafted messages. A local user can send specially crafted messages to cause a denial of service.
The vulnerability is only exploitable on 32-bit systems.
Remediation
Install update from vendor's website.