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PCP pmproxy EUVDEUVD-2026-50978

| CVE-2026-16530 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
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

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. No public exploit code has been identified at time of analysis, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Technical ContextAI

PCP (Performance Co-Pilot) is a systems monitoring and performance analysis toolkit shipped with Red Hat Enterprise Linux and used in OpenShift Container Platform 4 environments. The pmproxy daemon acts as a protocol proxy and REST API gateway for PCP metrics. CWE-125 (Out-of-bounds Read) is the root cause: the pmLogLoadInDom() function, which is responsible for loading performance domain data from log archives, fails to adequately validate input bounds before reading. A crafted request can cause the function to read beyond an allocated buffer, producing two distinct effects - a potential process crash when the invalid memory access faults (availability impact), and possible exposure of adjacent in-process memory contents to an attacker (confidentiality impact). CPE strings confirm the vulnerability spans all major RHEL generations (6, 7, 8, 9, 10) as distributed by Red Hat, per cpe:2.3:a:red_hat:red_hat_enterprise_linux_*. Notably, the vulnerability tags include 'Buffer Overflow', but the assigned CWE-125 specifically describes an Out-of-bounds Read - a read-side flaw distinct from write-side buffer overflow (CWE-120); this tagging inconsistency should be treated as a metadata artifact rather than a technical descriptor.

RemediationAI

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. As an immediate compensating control, restrict network access to the pmproxy service (default port 44322) using firewall rules or SELinux policy to allow connections only from trusted management hosts - this directly mitigates the network-accessible attack vector (AV:N) and is the highest-value interim mitigation with minimal service disruption for legitimate users. If pmproxy is not operationally required, disabling the service (systemctl stop pmproxy && systemctl disable pmproxy) eliminates the attack surface entirely with no trade-offs beyond loss of PCP proxy functionality. On OpenShift Container Platform 4, restrict pmproxy pod network exposure via NetworkPolicy resources to limit lateral reachability.

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Local privilege escalation in Performance Co-Pilot (PCP) on Red Hat Enterprise Linux 6 through 10 and OpenShift Containe

Same weakness CWE-125 – Out-of-bounds Read

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CVE-2014-0160 HIGH POC
7.5
CVE-2016-5198 HIGH POC
8.8
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9.3
CVE-2016-1646 HIGH POC
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CVE-2017-5030 HIGH POC
8.8
CVE-2016-4523 HIGH
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CVE-2024-48456 HIGH POC
7.5
CVE-2024-48457 HIGH POC
7.5

Same technique Buffer Overflow

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CVE-2017-7269 CRITICAL POC
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CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
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CVE-2011-2462 CRITICAL POC
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CVE-2020-0796 CRITICAL POC
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CVE-2019-11043 CRITICAL POC
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CVE-2009-0927 HIGH POC
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CVE-2012-1889 HIGH POC
8.8

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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EUVD-2026-50978 vulnerability details – vuln.today
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