CVE-2025-26465: Openssh: machine-in-the-middle attack if verifyhostkeydns is enabled
Red Hat · Red Hat Enterprise Linux 8
Vendor fix available · Affected: Red Hat Enterprise Linux 8 · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 94% of scored CVEs
DescriptionCVE.org
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.
Affected products11
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- OpenSSHfrom 6.8p1 up to and including 9.9p1
- Red Hat · Red Hat Enterprise Linux 8Versions not stated
- Red Hat · Red Hat Enterprise Linux 8Versions not stated
- Red Hat · Red Hat Enterprise Linux 9Versions not stated
- Red Hat · Red Hat Enterprise Linux 9Versions not stated
- Red Hat · Red Hat Enterprise Linux 9.4 Extended Update SupportVersions not stated
- Red Hat · Red Hat Discovery 1.14Versions not stated
- Red Hat · Red Hat Enterprise Linux 10Versions not stated
- Red Hat · Red Hat Enterprise Linux 6Versions not stated
- Red Hat · Red Hat Enterprise Linux 7Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4Versions not stated
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Red Hat
- Published
- February 2025
CoverageNo articles yet
No CyberSIXT article names CVE-2025-26465 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-390cwe.mitre.org
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- access.redhat.com/security/cve/CVE-2025-26465access.redhat.com
- access.redhat.com/solutions/7109879access.redhat.com
- Issue trackerbugzilla.redhat.com
- seclists.org/oss-sec/2025/q1/144seclists.org
- lists.debian.org/debian-lts-announce/2025/02/msg00020.htmllists.debian.org
- openwall.com/lists/oss-security/2025/02/18/1openwall.com
- openwall.com/lists/oss-security/2025/02/18/4openwall.com
- theregister.com/2025/02/18/openssh_vulnerabilities_mitm_dostheregister.com
15 more references are in the CVE record.