CVE-2026-0966
High
Description
A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Libssh
PublishedMar 26, 2026
First seenMar 26, 2026
Weakness typeCWE-124CWE-124
How to fix
Update
- libssh libssh0.11.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libssh libssh | v < 0.11.4 | 0.11.4 |
| redhat hardened_images | No range specified | — |
| redhat openshift_container_platform | 4.0 | — |
| redhat enterprise_linux | 8.0, 9.0, 10.0 | — |
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