Medium · CVSS 6.5CVE-2026-16530

Pcp: pcp: remote denial of service and information leakageCVE-2026-16530

Answer in brief

CVE-2026-16530 records a Medium severity (CVSS 6.5) vulnerability in Pcp: pcp: remote denial of service and information leakage. The current sources do not mark it as known exploited. The current feed maps Red Hat/openshift/ose-rhel-coreos-9 (generic), Red Hat/pcp (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 30, 2026Updated Aug 21, 2026Source checked Oct 5, 2026First seen by HOL Aug 21, 2026Material review Aug 21, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/openshift/ose-rhel-coreos-9 (generic), Red Hat/pcp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Red Hat/openshift/ose-rhel-coreos-9generic	*	Not reported
Red Hat/pcpgeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Red Hat/openshift/ose-rhel-coreos-9, Red Hat/pcp.
Review the reported fix. Source-reported workaround: To mitigate this issue, restrict network access to the `pmproxy` service on TCP port 44322 using firewall rules. Alternatively, if the `pmproxy` service is not required, it can be disabled to prevent exploitation. Example to disable `pmproxy`: `sudo systemctl stop pmproxy` `sudo systemctl disable pmproxy` Note that disabling `pmproxy` may impact functionality that relies on it. A service reload or restart may be required for changes to take effect.

Evidence timeline and material changes

Published upstream
Jul 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 21, 2026

Sources and claim methodology

Upstream source description

A flaw was found in the PCP (Performance Co-Pilot) `pmproxy` service. A remote attacker can exploit a vulnerability in the `pmLogLoadInDom()` function by sending a specially crafted request. This bypasses a critical bounds check, which can lead to the `pmproxy` service crashing, causing a Denial of Service (DoS). Additionally, this flaw may enable the leakage of sensitive information from the system's memory.

Quoted source text, attributed separately from HOL analysis.