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Fencer Vulns
high 7.5

CVE-2026-19654 json

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

published 2026-08-12 2 mo ago modified 2026-11-05 4 d ago also EUVD-2026-57617

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:8.2510.0-5.el10_2.1
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:8.2412.0-1.el10_0.1
  • Red Hat Red Hat Enterprise Linux 8 0:8.2102.0-15.el8_10.3
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:8.1911.0-7.el8_4.5
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:8.1911.0-7.el8_4.5
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:8.2102.0-7.el8_6.2
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:8.2102.0-7.el8_6.2
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:8.2102.0-13.el8_8.1
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:8.2102.0-13.el8_8.1
  • Red Hat Red Hat Enterprise Linux 9 0:8.2510.0-2.el9_8.1
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:8.2102.0-113.el9_2.3
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:8.2310.0-4.el9_4.1
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:8.2412.0-1.el9_6.2
  • Red Hat Red Hat Update Infrastructure 5 1790241900
  • rsyslog Debian 13 8.2504.0-1+deb13u1
  • rsyslog Debian 14 8.2608.0-1

debian advisories DEBIAN-CVE-2026-19654

  • rsyslog Ubuntu 22.04 LTS 8.2112.0-2ubuntu2.4
  • rsyslog Ubuntu 24.04 LTS 8.2312.0-3ubuntu9.3
  • rsyslog Ubuntu 26.04 LTS 8.2512.0-1ubuntu4.1

ubuntu advisories UBUNTU-CVE-2026-19654

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rsyslog RHEL 8 8.2102.0-15.el8_10.3
  • rsyslog RHEL 10.2 8.2510.0-5.el10_2.1
  • rsyslog-relp RHEL 10.2 8.2510.0-5.el10_2.1
  • rsyslog-snmp RHEL 10.2 8.2510.0-5.el10_2.1
  • rsyslog-kafka RHEL 10.2 8.2510.0-5.el10_2.1
  • rsyslog-mysql RHEL 10.2 8.2510.0-5.el10_2.1
  • rsyslog-pgsql RHEL 10.2 8.2510.0-5.el10_2.1
  • rsyslog-crypto RHEL 10.2 8.2510.0-5.el10_2.1

red hat advisories RHSA-2026:84571RHSA-2026:84576RHSA-2026:80817RHSA-2026:67584RHSA-2026:67583RHSA-2026:66405

  • rsyslog SLE Module for Server Applications 15 SP7, SLE Module for Package Hub 15 SP7, SLE Module for Basesystem 15 SP7 8.2608.0-150700.3.24.1

suse advisories SUSE-SU-2026:4611-1

  • rsyslog openSUSE Leap 16.0 8.2608.0-160000.1.1

opensuse advisories openSUSE-SU-2026:22184-1

  • rsyslog AlmaLinux 8 8.2102.0-15.el8_10.3
  • rsyslog-relp AlmaLinux 8 8.2102.0-15.el8_10.3
  • rsyslog-snmp AlmaLinux 8 8.2102.0-15.el8_10.3
  • rsyslog-kafka AlmaLinux 8 8.2102.0-15.el8_10.3
  • rsyslog-mysql AlmaLinux 8 8.2102.0-15.el8_10.3
  • rsyslog-pgsql AlmaLinux 8 8.2102.0-15.el8_10.3
  • rsyslog-crypto AlmaLinux 8 8.2102.0-15.el8_10.3
  • rsyslog-gnutls AlmaLinux 8 8.2102.0-15.el8_10.3

almalinux advisories ALSA-2026:80817ALSA-2026:67583ALSA-2026:67584

  • rsyslog Rocky Linux 8 8.2102.0-15.el8_10.3
  • rsyslog Rocky Linux 10 8.2510.0-5.el10_2.1
  • rsyslog Rocky Linux 9 8.2510.0-2.el9_8.1

rocky linux advisories RLSA-2026:80817RLSA-2026:67584RLSA-2026:67583

  • rsyslog Alpine 3.24 8.2608.0-r0

alpine advisories ALPINE-CVE-2026-19654

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rsyslog Azure Linux 3.0 8.2308.0-6

azure linux advisories AZL-95958

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-19654 updated cvss 7.5

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

  • Red Hat Enterprise Linux AppStream (v. 8) rsyslog 8.2102.0-15.el8_10.3
    fixed: vendor fix RHSA-2026:80817
  • Red Hat Enterprise Linux AppStream (v. 9) rsyslog 8.2510.0-2.el9_8.1, rsyslog-relp 8.2510.0-2.el9_8.1, rsyslog-snmp 8.2510.0-2.el9_8.1, rsyslog-kafka 8.2510.0-2.el9_8.1, rsyslog-mysql 8.2510.0-2.el9_8.1, rsyslog-pgsql 8.2510.0-2.el9_8.1, +14 more
    fixed: vendor fix RHSA-2026:67583
  • Red Hat Enterprise Linux AppStream (v. 10) rsyslog 8.2510.0-5.el10_2.1, rsyslog-relp 8.2510.0-5.el10_2.1, rsyslog-snmp 8.2510.0-5.el10_2.1, rsyslog-kafka 8.2510.0-5.el10_2.1, rsyslog-mysql 8.2510.0-5.el10_2.1, rsyslog-pgsql 8.2510.0-5.el10_2.1, +13 more
    fixed: vendor fix RHSA-2026:67584
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) rsyslog 8.1911.0-7.el8_4.5, rsyslog-relp 8.1911.0-7.el8_4.5, rsyslog-snmp 8.1911.0-7.el8_4.5, rsyslog-kafka 8.1911.0-7.el8_4.5, rsyslog-mysql 8.1911.0-7.el8_4.5, rsyslog-pgsql 8.1911.0-7.el8_4.5, +11 more
    fixed: vendor fix RHSA-2026:95573
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) rsyslog 8.2102.0-7.el8_6.2, rsyslog-relp 8.2102.0-7.el8_6.2, rsyslog-snmp 8.2102.0-7.el8_6.2, rsyslog-kafka 8.2102.0-7.el8_6.2, rsyslog-mysql 8.2102.0-7.el8_6.2, rsyslog-pgsql 8.2102.0-7.el8_6.2, +13 more
    fixed: vendor fix RHSA-2026:91582
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) rsyslog 8.2102.0-13.el8_8.1, rsyslog-relp 8.2102.0-13.el8_8.1, rsyslog-snmp 8.2102.0-13.el8_8.1, rsyslog-kafka 8.2102.0-13.el8_8.1, rsyslog-mysql 8.2102.0-13.el8_8.1, rsyslog-pgsql 8.2102.0-13.el8_8.1, +13 more
    fixed: vendor fix RHSA-2026:87408
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) rsyslog 8.2102.0-113.el9_2.3, rsyslog-relp 8.2102.0-113.el9_2.3, rsyslog-snmp 8.2102.0-113.el9_2.3, rsyslog-kafka 8.2102.0-113.el9_2.3, rsyslog-mysql 8.2102.0-113.el9_2.3, rsyslog-pgsql 8.2102.0-113.el9_2.3, +14 more
    fixed: vendor fix RHSA-2026:86124
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rsyslog 8.2310.0-4.el9_4.1, rsyslog-kafka 8.2310.0-4.el9_4.1, rsyslog-crypto 8.2310.0-4.el9_4.1, rsyslog-gnutls 8.2310.0-4.el9_4.1, rsyslog-openssl 8.2310.0-4.el9_4.1, rsyslog-logrotate 8.2310.0-4.el9_4.1, +1 more
    fixed: vendor fix RHSA-2026:84571
show 7 more
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rsyslog 8.2412.0-1.el10_0.1, rsyslog-relp 8.2412.0-1.el10_0.1, rsyslog-snmp 8.2412.0-1.el10_0.1, rsyslog-kafka 8.2412.0-1.el10_0.1, rsyslog-mysql 8.2412.0-1.el10_0.1, rsyslog-pgsql 8.2412.0-1.el10_0.1, +13 more
    fixed: vendor fix RHSA-2026:66405
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rsyslog 8.2412.0-1.el9_6.2, rsyslog-relp 8.2412.0-1.el9_6.2, rsyslog-snmp 8.2412.0-1.el9_6.2, rsyslog-kafka 8.2412.0-1.el9_6.2, rsyslog-mysql 8.2412.0-1.el9_6.2, rsyslog-pgsql 8.2412.0-1.el9_6.2, +14 more
    fixed: vendor fix RHSA-2026:84576
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) rsyslog 8.1911.0-7.el8_4.5, rsyslog-relp 8.1911.0-7.el8_4.5, rsyslog-snmp 8.1911.0-7.el8_4.5, rsyslog-kafka 8.1911.0-7.el8_4.5, rsyslog-mysql 8.1911.0-7.el8_4.5, rsyslog-pgsql 8.1911.0-7.el8_4.5, +11 more
    fixed: vendor fix RHSA-2026:95573
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) rsyslog 8.2102.0-7.el8_6.2, rsyslog-relp 8.2102.0-7.el8_6.2, rsyslog-snmp 8.2102.0-7.el8_6.2, rsyslog-kafka 8.2102.0-7.el8_6.2, rsyslog-mysql 8.2102.0-7.el8_6.2, rsyslog-pgsql 8.2102.0-7.el8_6.2, +13 more
    fixed: vendor fix RHSA-2026:91582
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) rsyslog 8.2102.0-13.el8_8.1, rsyslog-relp 8.2102.0-13.el8_8.1, rsyslog-snmp 8.2102.0-13.el8_8.1, rsyslog-kafka 8.2102.0-13.el8_8.1, rsyslog-mysql 8.2102.0-13.el8_8.1, rsyslog-pgsql 8.2102.0-13.el8_8.1, +13 more
    fixed: vendor fix RHSA-2026:87408
  • Red Hat Update Infrastructure 5 rhui5/haproxy-rhel9 1790241900
    fixed: vendor fix RHSA-2026:71603
  • Red Hat Enterprise Linux 6 rsyslog, rsyslog7, rsyslog-relp, rsyslog-snmp, rsyslog-mysql, rsyslog-pgsql, +9 more Red Hat Enterprise Linux 7 rsyslog, rsyslog-relp, rsyslog-snmp, rsyslog-kafka, rsyslog-mysql, rsyslog-pgsql, +11 more Red Hat Enterprise Linux AppStream (v. 8) rsyslog-relp 8.2102.0-15.el8_10.3, rsyslog-snmp 8.2102.0-15.el8_10.3, rsyslog-kafka 8.2102.0-15.el8_10.3, rsyslog-mysql 8.2102.0-15.el8_10.3, rsyslog-pgsql 8.2102.0-15.el8_10.3, rsyslog-crypto 8.2102.0-15.el8_10.3, +12 more Red Hat Enterprise Linux AppStream AUS (v.8.4) rsyslog-doc 8.1911.0-7.el8_4.5, rsyslog-udpspoof-debuginfo 8.1911.0-7.el8_4.5 Red Hat Enterprise Linux AppStream AUS (v.8.6) rsyslog-doc 8.2102.0-7.el8_6.2, rsyslog-udpspoof-debuginfo 8.2102.0-7.el8_6.2 Red Hat Enterprise Linux AppStream E4S (v.8.8) rsyslog-doc 8.2102.0-13.el8_8.1, rsyslog-relp-debuginfo 8.2102.0-13.el8_8.1, rsyslog-snmp-debuginfo 8.2102.0-13.el8_8.1, rsyslog-pgsql-debuginfo 8.2102.0-13.el8_8.1, rsyslog-omamqp1-debuginfo 8.2102.0-13.el8_8.1, rsyslog-openssl-debuginfo 8.2102.0-13.el8_8.1, +1 more
    +7 more products
    Red Hat Enterprise Linux AppStream E4S (v.9.2) rsyslog-doc 8.2102.0-113.el9_2.3, rsyslog-relp-debuginfo 8.2102.0-113.el9_2.3, rsyslog-snmp-debuginfo 8.2102.0-113.el9_2.3, rsyslog-kafka-debuginfo 8.2102.0-113.el9_2.3, rsyslog-mysql-debuginfo 8.2102.0-113.el9_2.3, rsyslog-pgsql-debuginfo 8.2102.0-113.el9_2.3, +12 more Red Hat Enterprise Linux AppStream E4S (v.9.4) rsyslog-relp 8.2310.0-4.el9_4.1, rsyslog-snmp 8.2310.0-4.el9_4.1, rsyslog-mysql 8.2310.0-4.el9_4.1, rsyslog-pgsql 8.2310.0-4.el9_4.1, rsyslog-gssapi 8.2310.0-4.el9_4.1, rsyslog-mmaudit 8.2310.0-4.el9_4.1, +7 more Red Hat Enterprise Linux AppStream EUS (v.9.6) rsyslog-doc 8.2412.0-1.el9_6.2, rsyslog-relp-debuginfo 8.2412.0-1.el9_6.2, rsyslog-kafka-debuginfo 8.2412.0-1.el9_6.2, rsyslog-mysql-debuginfo 8.2412.0-1.el9_6.2, rsyslog-pgsql-debuginfo 8.2412.0-1.el9_6.2, rsyslog-gnutls-debuginfo 8.2412.0-1.el9_6.2, +9 more Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) rsyslog-doc 8.1911.0-7.el8_4.5, rsyslog-udpspoof-debuginfo 8.1911.0-7.el8_4.5 Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) rsyslog-doc 8.2102.0-7.el8_6.2, rsyslog-udpspoof-debuginfo 8.2102.0-7.el8_6.2 Red Hat Enterprise Linux AppStream TUS (v.8.8) rsyslog-doc 8.2102.0-13.el8_8.1, rsyslog-relp-debuginfo 8.2102.0-13.el8_8.1, rsyslog-snmp-debuginfo 8.2102.0-13.el8_8.1, rsyslog-pgsql-debuginfo 8.2102.0-13.el8_8.1, rsyslog-omamqp1-debuginfo 8.2102.0-13.el8_8.1, rsyslog-openssl-debuginfo 8.2102.0-13.el8_8.1, +1 more Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1790241954, rhui5/rhua-rhel9 1790242004, rhui5/installer-rhel9 1790241922, rhui5/cds-kubernetes-rhel9 1790241897
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Update Infrastructure 5
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.