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CVE-2026-19654— Rsyslog: a configuration-dependent issue in rsyslog's optional imptcp input module can allow an unauthenticated remote peer to crash rsyslogd

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rsyslog是rsyslog公司开源的一个速度极快的日志处理管道系统。 Rsyslog存在缓冲区错误漏洞，该漏洞源于可选imptcp模块中存在缺陷，在超大帧恢复期间特制输入序列可能导致无效的内部消息长度并终止rsyslogd，未经身份验证的远程攻击者可能利用此漏洞导致拒绝服务。

CVSS 7.5 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 8

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:8.2510.0-5.el10_2.1< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:8.2412.0-1.el10_0.1< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 0:8.2510.0-2.el9_8.1< * unaffected
Red Hat Red Hat Update Infrastructure 5 1790241900< * unaffected
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I. Basic Information for CVE-2026-19654

Vulnerability Information
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Vulnerability Title
Rsyslog: a configuration-dependent issue in rsyslog's optional imptcp input module can allow an unauthenticated remote peer to crash rsyslogd
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Rsyslog 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rsyslog是rsyslog公司开源的一个速度极快的日志处理管道系统。 Rsyslog存在缓冲区错误漏洞，该漏洞源于可选imptcp模块中存在缺陷，在超大帧恢复期间特制输入序列可能导致无效的内部消息长度并终止rsyslogd，未经身份验证的远程攻击者可能利用此漏洞导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:8.2510.0-5.el10_2.1 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:8.2412.0-1.el10_0.1 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 9 0:8.2510.0-2.el9_8.1 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Update Infrastructure 5 1790241900 ~ * cpe:/a:redhat:rhui:5::el9
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8

II. Public POCs for CVE-2026-19654

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 9714 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-19654

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Vendor Advisories for CVE-2026-19654 (7)

Same Patch Batch · Red Hat · 2026-08-12 · 19 CVEs total

CVE-2026-72526 9.9 CRITICAL Multicloud-integrations: multicloud-integrations: pull-model propagation allows hub tenant
CVE-2026-72508 9.9 CRITICAL Multicloud-operators-subscription: multicloud-operators-subscription: hub and spoke servic
CVE-2026-73268 9.9 CRITICAL Cluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows ar
CVE-2026-73269 9.9 CRITICAL Cluster-curator-controller: cluster-curator-controller: tenant-controllable trigger create
CVE-2026-70398 9.6 CRITICAL Multicloud-integrations: multicloud-integrations: gitopscluster.spec.argoserver.argonamesp
CVE-2026-71471 9.0 CRITICAL Acm-search-v2-rhel9: search-v2-operator: hub search cr collector.imageoverride propagated
CVE-2026-13622 8.8 HIGH Kubevirt: virt-handler-rhel9: kubevirt: virt-handler migration proxy follows symlinks allo
CVE-2026-71473 8.5 HIGH Acm-search-v2-rhel9: search-v2-operator: addonfactory.getvaluesfromaddonannotation enables
CVE-2026-73122 7.7 HIGH Multicloud-operators-channel: multicloud-operators-channel: auto-generated role grants eve
CVE-2026-66878 7.7 HIGH Multicloud-operators-subscription: multicloud-operators-subscription: fetchchannelreferenc
CVE-2026-71469 7.5 HIGH Acm-search-v2-api-rhel9: search-v2-api: unbounded tokenreviews cache allows unauthenticate
CVE-2026-18726 6.5 MEDIUM Open-iscsi: open-iscsi: denial of service in iscsiuio router advertisement parsing
CVE-2026-18727 6.5 MEDIUM Open-iscsi: open-iscsi: integer underflow in iscsiuio dhcpv6 parsing
CVE-2026-71846 6.5 MEDIUM Insights-client: insights-client: clusterrole grants cluster-wide secrets get/list/watch b
CVE-2026-64927 6.4 MEDIUM Multicloud-operators-channel: multicloud-operators-channel: cross-namespace secret and con
CVE-2026-18663 5.9 MEDIUM 389-ds-base: 389-ds-base: pre-authentication double-free in get_ldapmessage_controls_ext()
CVE-2026-19130 5.8 MEDIUM Provider-credential-controller: provider-credential-controller: cross-namespace credential
CVE-2026-19548 5.5 MEDIUM Binutils: binutils: multiple use-after-free in add_archive_element via lto plugin processi

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2026-19654

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