All vulnerabilities

Servers and applications

CVE-2025-26466

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…

Severity
Medium 5.9
Published
28 Feb 2025
Last changed
21 Oct 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSHServers and applications · cpe:a:openbsd:openssh
  • Version 9.9-p1
  • Version 9.9
  • Version 9.8-p1
  • Version 9.8
All 9 release lines
  • Version 9.5-p1
  • Version 9.6
  • Version 9.6-p1
  • Version 9.7
  • Version 9.7-p1
  • Version 9.8
  • Version 9.8-p1
  • Version 9.9
  • Version 9.9-p1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-26466
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-26466