Fiche vulnérabilité
CVE-2025-26465 : faille moyenne openbsd openssh (CVSS 6.8)
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.
En bref
- Sévérité
- Moyenne (CVSS 6.8)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- Exploitation active
- Non signalée par la CISA
- Publication
- 18 févr. 2025
- Dernière mise à jour
- 2 sept. 2026
Produits concernés
- openbsd openssh
- netapp active iq unified manager
- netapp ontap
- redhat openshift container platform
- debian debian linux
- redhat enterprise linux
Références
- Fiche CVE-2025-26465 sur le NVD (NIST)
- access.redhat.com/errata/RHSA-2025:16823
- access.redhat.com/errata/RHSA-2025:3837
- access.redhat.com/errata/RHSA-2025:6993
- access.redhat.com/errata/RHSA-2025:8385
- access.redhat.com/security/cve/CVE-2025-26465
- access.redhat.com/solutions/7109879
- bugzilla.redhat.com/show_bug.cgi
- seclists.org/oss-sec/2025/q1/144
- seclists.org/fulldisclosure/2025/Feb/18
- seclists.org/fulldisclosure/2025/May/7
- seclists.org/fulldisclosure/2025/May/8
- blog.qualys.com/vulnerabilities…
- bugzilla.suse.com/show_bug.cgi
- ftp.openbsd.org/pub/OpenBSD/patches/7…
- lists.debian.org/debian-lts-announce/2025/02/msg00020.html