Is CVE-2011-1951 actively exploited?

CVE-2011-1951 has no public evidence of in-the-wild exploitation as of 2025-04-11.

What is the CVSS score for CVE-2011-1951?

CVE-2011-1951 has a CVSS score of 4.3 (UNKNOWN severity). Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P.

How do I patch CVE-2011-1951?

Patch guidance is available from oneidentity security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2011-1951.

Which products are affected by CVE-2011-1951?

1 product: oneidentity syslog-ng.

CVE-2011-1951 - remediation guidance & executive summary

Description

lib/logmatcher.c in Balabit syslog-ng before 3.2.4, when the global flag is set and when using PCRE 8.12 and possibly other versions, allows remote attackers to cause a denial of service (memory consumption) via a message that does not match a regular expression.

CVSS Metrics

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector: network
Access Cmplx: medium
Auth: none
Confidentiality: none
Integrity: none
Availability: partial
Weaknesses: CWE-399

Metadata

Primary Vendor: ONEIDENTITY
Published: 7/11/2011
Last Modified: 4/11/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

oneidentity : syslog-ng

Remediation Guidance

Executive Summary

Cite this page

CVE-2011-1951. CVEDatabase.com. Retrieved 3 May 2026. https://cvedatabase.com/cve/CVE-2011-1951

View on NIST NVD

CVE-2011-1951 vulnerability