CVE Database›CVE-2020-16135

CVE-2020-16135

libssh: NULL pointer dereference in sftpserver.c if ssh_buffer_new returns NULL

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Severity

Low

Red Hat Product Security

5.9

CVSS 3.1

Review impact separately from score.

Published · July 30, 2020

Updated · November 21, 2025

Description

A flaw was found in libssh. A NULL pointer dereference in tftpserver.c if ssh_buffer_new returns NULL.

Statement

libssh2 as shipped with Red Hat Enterprise Linux 6, 7, and 8 are NOT affected by this flaw; libssh2 and libssh are different codebases and libssh2 does not contain the vulnerable code. Red Hat Product Security has set the impact of this flaw to Low because there is no demonstrated way for an attacker to reliably force a NULL pointer dereference via a code path in the affected libssh code.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference