SB2025091206 - Denial of service in libssh
Published: September 12, 2025
Security Bulletin ID
SB2025091206
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Double free (CVE-ID: CVE-2025-5351)
CWE-ID: CWE-415 - Double Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the internal function responsible for converting cryptographic keys into serialized formats. A remote user can trigger a double free error and perform a denial of service attack in low-memory scenarios.
Remediation
Install update from vendor's website.