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PCP pmproxy CVE-2026-16530

| EUVDEUVD-2026-50978 MEDIUM
Out-of-bounds Read (CWE-125)
2026-07-30 redhat GHSA-m276-429x-f63w
Buffer Overflow Denial Of Service Information Disclosure Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Red Hat Openshift Container Platform 4 Red Hat Suse
Medium
Disputed · 6.5 Vendor: redhat
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Severity by source

Sources disagree (Medium–Critical)
Vendor (redhat) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
vuln.today AI
6.5 MEDIUM

Network-reachable unauthenticated service; OOB read produces memory disclosure (C:L) and crash (A:L) but no integrity impact, contradicting the vendor-assigned I:L.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
SUSE
8.2 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Red Hat
6.5 MEDIUM
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: redhat

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Jul 30, 2026 - 09:00 vuln.today
CVE Published
Jul 30, 2026 - 05:30 nvd
MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Remote unauthenticated denial of service and memory disclosure in the Performance Co-Pilot (PCP) pmproxy service affects Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4. An out-of-bounds read (CWE-125) in the pmLogLoadInDom() function can be triggered by a specially crafted network request, causing the pmproxy process to crash and potentially leaking sensitive data from process memory. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify network-exposed pmproxy endpoint
Delivery
Craft malformed request targeting pmLogLoadInDom()
Exploit
Send request to pmproxy TCP port
Execution
Trigger out-of-bounds read past buffer boundary
Impact
Crash pmproxy process (DoS) or capture returned memory fragments (info disclosure)
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Vulnerability AssessmentAI

Exploitation The PCP pmproxy service must be running and reachable over the network from the attacker - pmproxy is not enabled by default on all RHEL installations and must be explicitly started and network-exposed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vendor-assigned CVSS 3.1 score of 6.5 with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L contains a notable internal inconsistency: the description explicitly states the flaw 'may enable the leakage of sensitive information from the system's memory,' which implies a confidentiality impact - yet the vector assigns C:N and anomalously assigns I:L (integrity). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated remote attacker with network access to a host exposing the pmproxy service sends a specially crafted HTTP or PCP protocol request that triggers the pmLogLoadInDom() function with malformed input, causing an out-of-bounds read. The resulting memory access violation crashes the pmproxy daemon, interrupting performance metric collection and proxy services for the affected host. …
Remediation Apply the vendor-released patch via Red Hat's official channels (yum/dnf update pcp) once a fix is published; monitor https://access.redhat.com/security/cve/CVE-2026-16530 and https://bugzilla.redhat.com/show_bug.cgi?id=2506033 for patch availability announcements, as no specific fixed PCP package version is confirmed in the current intelligence. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 Affected

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CVE-2026-16530 vulnerability details – vuln.today
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