Out-of-bounds Read in Rsyslog
CVE-2026-19654
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-19654 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- github.com/rsyslog/rsyslog/security/advisories/GHSA-cj5r-wh2m-7w29 (Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:66405 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:67583 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:67584 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:71603 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-19654?
- CVE-2026-19654 is a high-severity vulnerability in Rsyslog, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-08-12.
- How severe is CVE-2026-19654?
- High severity. CVSS v3 base score is 7.5 out of 10.