SB2025073034 - Red Hat Enterprise Linux 9 update for libtpms
Published: July 30, 2025
Security Bulletin ID
SB2025073034
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) Out-of-bounds read (CVE-ID: CVE-2025-49133)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the CryptHmacSign() function. A local user can trigger an out-of-bounds read error by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation and make vTPM (swtpm) unavailable to a VM.
Remediation
Install update from vendor's website.