Packages
- libssh2 - Client-side C library implementing the SSH2 protocol
Details
It was discovered that libssh2 incorrectly handled certain publickey
subsystem attributes. A remote attacker controlling a malicious SSH server
could use this issue to cause a denial of service or possibly execute
arbitrary code. (CVE-2026-58050)
It was discovered that libssh2 did not properly initialize publickey list
entries before parsing. A remote attacker controlling a malicious SSH
server could use this issue to cause a denial of service or possibly
execute arbitrary code. (CVE-2026-58051)
It was discovered that libssh2 incorrectly handled certain publickey
subsystem attributes. A remote attacker controlling a malicious SSH server
could use this issue to cause a denial of service or possibly execute
arbitrary code. (CVE-2026-58050)
It was discovered that libssh2 did not properly initialize publickey list
entries before parsing. A remote attacker controlling a malicious SSH
server could use this issue to cause a denial of service or possibly
execute arbitrary code. (CVE-2026-58051)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | libssh2-1t64 – 1.11.1-1ubuntu0.26.04.3 | ||
| 24.04 LTS noble | libssh2-1t64 – 1.11.0-4.1ubuntu0.24.04.3 | ||
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.