CVE-2025-26465
openssh - security update
6.8
MEDIUM
CVSS 3.1
EPSS 7.0%
Description
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
How to fix CVE-2025-26465
To remediate CVE-2025-26465, upgrade the affected package to a fixed version below.
- —upgrade to 9.3_p2-r3 or later
Is CVE-2025-26465 being exploited?
Moderate — EPSS is 7.0%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- >= 6.9, < 9.3_p2-r3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |