CVEvulnerability

CVE-2026-59843

6.5 MEDIUM Published 2026-07-21 Modified 2026-09-01 Official page ↗
Status
Modified
Published
2026-07-21
Last modified
2026-09-01
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400, CWE-835

Description

A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service.

Affected configurations

• libssh libssh • redhat hardened images • redhat enterprise linux 8.0 • redhat enterprise linux 9.0 • redhat enterprise linux 10.0

Related

Weakness · CWE (2)

  • CWE-400 Uncontrolled Resource Consumption weakness
  • CWE-835 Loop with Unreachable Exit Condition weakness

References