SB2026010557 - Usage of weak ciphers in libtpms
Published: January 5, 2026
Security Bulletin ID
SB2026010557
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Cryptographic issues (CVE-ID: CVE-2026-21444)
The vulnerability allows an attacker to potentially decrypt data.
The vulnerability exists due to an error related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps.
Remediation
Install update from vendor's website.