SB2026010861 - Ubuntu update for libsodium
Published: January 8, 2026
Security Bulletin ID
SB2026010861
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote 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-2025-69277)
The vulnerability allows a remote attacker to read or manipulate encrypted data.
The vulnerability exists due to an error within the ge25519_is_on_main_subgroup() function in src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c in atypical use cases involving certain custom cryptography or untrusted data passed to crypto_core_ed25519_is_valid_point(). A remote attacker can read or manipulate encrypted data.
Remediation
Install update from vendor's website.