CVE-2026-19654 Denial of service in Red Hat Enterprise Linux 10

What is CVE-2026-19654?

CVE-2026-19654 is a high-severity denial of service vulnerability in Redhat Enterprise Linux, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2026-19654?

It affects 2 products.

Products include Redhat Enterprise Linux, Rsyslog Rsyslog.

How do I fix CVE-2026-19654?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-19654 being exploited?

There is no known exploitation of CVE-2026-19654 in the wild and no public exploit code.

Other vulnerabilities in Redhat Enterprise Linux

• CVE-2018-14667 Red Hat JBoss RichFaces Framework Expression Language Injection Exploited Critical 9.8
• CVE-2021-20325 Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit Critical 9.8
• CVE-2018-25011 Memory corruption in libwebp Critical 9.8
• CVE-2018-25014 Other in libwebp Critical 9.8
• CVE-2014-3585 Supply chain in redhat-upgrade-tool Critical 9.8

All Redhat Enterprise Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALSA-2026:67583, ALSA-2026:67584, AZL-95958, CLSA-2026-1787819520, CLSA-2026-1788196350, CLSA-2026-1788262732 and 14 more.