CVE-2026-19654

Publication date 13 August 2026

Last updated 18 August 2026

Ubuntu priority

Cvss 3 Severity Score

Description

A unauthenticated remote peer may lead rsyslogd to crash due to a flaw in the optional imptcp module. A crafted input sequence during oversize-frame recovery can cause an invalid internal message length and terminate rsyslogd. No confidentiality or integrity impact, privilege escalation, or code execution has been identified. imtcp and the default imptcp framing modes are not affected.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
rsyslog	26.04 LTS resolute	Fixed 8.2512.0-1ubuntu4.1
	24.04 LTS noble	Fixed 8.2312.0-3ubuntu9.3
	22.04 LTS jammy	Fixed 8.2112.0-2ubuntu2.4
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

Notes

mdeslaur

The fix for this issue was included in USN-8598-1 but the CVE number wasn't available at time of publication

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
rsyslog	Upstream: https://github.com/rsyslog/rsyslog/pull/7410 Upstream: f7f7742

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H