DEBIAN-CVE-2025-26466

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Source
https://security-tracker.debian.org/tracker/CVE-2025-26466
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-26466.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2025-26466
Upstream
Published
2025-02-28T22:15:40Z
Modified
2025-09-19T06:17:32Z
Summary
[none]
Details

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.

References

Affected packages

Debian:13 / openssh

Package

Name
openssh
Purl
pkg:deb/debian/openssh?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:9.9p2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / openssh

Package

Name
openssh
Purl
pkg:deb/debian/openssh?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:9.9p2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}