CVE-2025-5318: Libssh: out-of-bounds read in sftp_handle()

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-24 · updated 2026-09-08
Weakness: CWE-125

Description

A flaw was found in the libssh library in versions less than 0.11.2. An out-of-bounds read can be triggered in the sftp_handle function due to an incorrect comparison check that permits the function to access memory beyond the valid handle list and to return an invalid pointer, which is used in further processing. This vulnerability allows an authenticated remote attacker to potentially read unintended memory regions, exposing sensitive information or affect service behavior.

Affected products

libssh: before 0.11.2 — fixed in 0.11.2
Red Hat Enterprise Linux: 8.0, 9.0, 10.0
Red Hat OpenShift Container Platform 4.18: 4.0

How to fix

Upgrade to a fixed version: libssh 0.11.2. Check the vendor advisory for mitigations.

References

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