Medium [CVE-2025-5318] out-of-bounds read in sftp_handle

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. This issue requires an attacker with valid credentials to access a server, limiting the scope to legitimate users of the SFTP service.

Due to this reason, this flaw has been rated with a Moderate severity. Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

Weakness: CWE-125.

Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 20 more.

Affected products named by the advisory: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Telecommunications Update Service; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; and 16 more.