SB2026080456 - Red Hat Enterprise Linux 9 update for postgresql
Published: August 4, 2026
Security Bulletin ID
SB2026080456
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Stack-based buffer overflow (CVE-ID: CVE-2026-6637)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to execute arbitrary code as the operating system user running the database.
The vulnerability exists due to a stack-based buffer overflow in the refint module when processing crafted input. A remote user can supply crafted input to execute arbitrary code as the operating system user running the database.
Remediation
Install update from vendor's website.