CVE-2026-19654

Rsyslog: a configuration-dependent issue in rsyslog's optional imptcp input module can allow an unauthenticated remote peer to crash rsyslogd

State: Published
Severity: 7.5 High
Published: Aug 12, 2026
Updated: Oct 30, 2026
Reserved: Aug 12, 2026

Read the record on cve.org

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:8.2510.0-5.el10_2.1 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:8.2412.0-1.el10_0.1 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:8.2102.0-15.el8_10.3 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	0:8.2102.0-7.el8_6.2 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	0:8.2102.0-7.el8_6.2 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	0:8.2102.0-13.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	0:8.2102.0-13.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:8.2510.0-2.el9_8.1 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:8.2102.0-113.el9_2.3 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:8.2310.0-4.el9_4.1 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:8.2412.0-1.el9_6.2 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1790241900 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat

References

RHSA-2026:66405vendor-advisory
RHSA-2026:67583vendor-advisory
RHSA-2026:67584vendor-advisory
RHSA-2026:71603vendor-advisory
RHSA-2026:80817vendor-advisory
RHSA-2026:84571vendor-advisory
RHSA-2026:84576vendor-advisory
RHSA-2026:86124vendor-advisory
RHSA-2026:87408vendor-advisory
RHSA-2026:91582vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-19654vdb-entry
RHBZ#2502868issue-tracking
https://github.com/rsyslog/rsyslog/security/advisories/GHSA-cj5r-wh2m-7w29

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