SB2026072281 - Input validation error in rsyslog

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Main Vulnerability Database SB2026072281

SB2026072281 - Input validation error in rsyslog

Published: July 22, 2026

Security Bulletin ID SB2026072281
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Input validation error (CVE-ID: N/A)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper input validation in the imptcp input module regex framing implementation when processing crafted input over a TCP connection to an imptcp listener configured with framing.delimiter.regex. A remote attacker can send crafted input to cause a denial of service.

The issue affects only deployments that explicitly load the optional imptcp module and configure an imptcp listener with the non-default framing.delimiter.regex setting. Default imptcp framing modes and the imtcp module are not affected.


Remediation

Install update from vendor's website.

References