libssh Client Configuration match_pattern redos

CVSS Meta Temp Score
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability was found in libssh and classified as problematic. The impacted element is the function match_pattern of the component Client Configuration Handler. Such manipulation leads to redos. This vulnerability is referenced as CVE-2026-0967. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in libssh (the affected version is unknown). Affected by this issue is the function match_pattern of the component Client Configuration Handler. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. CVE summarizes:

A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2026-0967. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1449.003.

The vulnerability scanner Nessus provides a plugin with the ID 298588 (Linux Distros Unpatched Vulnerability : CVE-2026-0967), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (298588), EUVD (EUVD-2026-16332) and CERT Bund (WID-SEC-2026-0446). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • SUSE openSUSE
  • Open Source libssh
  • Meinberg LANTIME

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 2.2
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 298588
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-0967

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/11/2026 Advisory disclosed
02/11/2026 +0 days VulDB entry created
05/19/2026 +97 days VulDB entry last update

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2026-0967 (🔒)
GCVE (CVE): GCVE-0-2026-0967
GCVE (VulDB): GCVE-100-345440
EUVD: 🔒
CERT Bund: WID-SEC-2026-0446 - libssh: Mehrere Schwachstellen ermöglichen Manipulation von Dateien und DoS

Entryinfo

Created: 02/11/2026 05:33
Updated: 05/19/2026 18:37
Changes: 02/11/2026 05:33 (49), 02/11/2026 18:52 (2), 02/18/2026 15:38 (7), 04/19/2026 16:52 (1), 05/19/2026 12:32 (22), 05/19/2026 18:37 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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