PT-2026-23936 · Libssh+3 · Libssh+3

Published 2025-12-11 · Updated 2026-04-23 · CVE-2026-3731

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions libssh versions up to 0.11.3

Description A flaw exists in libssh related to the SFTP Extension Name Handler component, specifically within the sftp extensions get name and sftp extensions get data functions in the src/sftp.c file. A manipulation of the idx argument can lead to an out-of-bounds read. This issue is potentially exploitable remotely.

Recommendations Upgrade to version 0.11.4 or 0.12.0.

Fix

DoS

Out of bounds Read

Buffer Overflow

Weakness Enumeration

CWE-125

CWE-119

Related Identifiers

AZL-79544

AZL-79547

BDU:2026-06714

CVE-2026-3731

ECHO-9DB6-4921-AEC5

OESA-2026-1560

OESA-2026-1652

OESA-2026-1653

OESA-2026-1654

OESA-2026-1655

OESA-2026-1656

RHSA-2026:7067

SUSE-SU-2026:0936-1

SUSE-SU-2026:1310-1

SUSE-SU-2026:1344-1

SUSE-SU-2026:1565-1

SUSE-SU-2026:20767-1

USN-8093-1

Affected Products

Linuxmint

Red Os

Ubuntu

Libssh

References · 75

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-3731 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0936-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1652 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1344-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06714 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:20767-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1656 · Vendor Advisory
• https://libssh.org/files/0.12/libssh-0.12.0.tar.xz · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-0967 · Security Note
• https://osv.dev/vulnerability/CVE-2026-3731 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2026-0421SE17 · Vendor Advisory
• https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-0965 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1653 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1654 · Vendor Advisory