5.9

CVE-2025-26466

Medienbericht

Openssh: denial-of-service in openssh

A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Openbsd ≫ Openssh Version 9.5 Update p1
Openbsd ≫ Openssh Version 9.6 Update -
Openbsd ≫ Openssh Version 9.6 Update p1
Openbsd ≫ Openssh Version 9.7 Update -
Openbsd ≫ Openssh Version 9.7 Update p1
Openbsd ≫ Openssh Version 9.8 Update -
Openbsd ≫ Openssh Version 9.8 Update p1
Openbsd ≫ Openssh Version 9.9 Update -
Openbsd ≫ Openssh Version 9.9 Update p1
Canonical ≫ Ubuntu Linux Version 24.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 24.10
Debian ≫ Debian Linux Version 11.0
Debian ≫ Debian Linux Version 12.0
Debian ≫ Debian Linux Version 13.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 39.85% 0.985
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
RedHat 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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VulnDex Intel
Media Report
06.11.2025 10:47
https://www.openwall.com/lists/oss-security/2025/02/18/1
Third Party Advisory
Mailing List
https://www.openwall.com/lists/oss-security/2025/02/18/4
Third Party Advisory
Mailing List
https://seclists.org/oss-sec/2025/q1/144
https://bugzilla.redhat.com/show_bug.cgi?id=2345043
Issue Tracking
https://www.qualys.com/2025/02/18/openssh-mitm-dos.txt
Third Party Advisory
https://security.netapp.com/advisory/ntap-20250228-0002/
Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1237041
Third Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-26466-detection-script-memory-consumption-vulnerability-in-openssh
https://www.vicarius.io/vsociety/posts/cve-2025-26466-mitigation-script-memory-consumption-vulnerability-in-openssh
http://seclists.org/fulldisclosure/2025/Feb/18
http://seclists.org/fulldisclosure/2025/May/7
http://seclists.org/fulldisclosure/2025/May/8
https://access.redhat.com/security/cve/CVE-2025-26466
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2025-26466
Third Party Advisory
https://ubuntu.com/security/CVE-2025-26466
Third Party Advisory
https://access.redhat.com/errata/RHBA-2025:6305