RHEL 8 : pcp (RHSA-2026:55560)

high Nessus Plugin ID 335990

Synopsis

The remote Red Hat host is missing one or more security updates for pcp.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:55560 advisory.

Performance Co-Pilot (PCP) is a suite of tools, services, and libraries for acquisition, archiving, and analysis of system-level performance measurements. Its light-weight distributed architecture makes it particularly well-suited to centralized analysis of complex systems.

Security Fix(es):

* PCP: PCP linux_sockets PMDA: Arbitrary Command Execution via Command Injection (CVE-2026-16524)

* PCP: PCP: Privilege escalation to root via linux_sockets PMDA vulnerability (CVE-2026-16526)

* PCP: PCP pmproxy: Unauthenticated access to /store endpoint allows bypassing pmcd access rules (CVE-2026-16527)

* PCP: PCP: Denial of Service due to signed integer overflow (CVE-2026-16529)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL pcp package based on the guidance in RHSA-2026:55560.

Plugin Details

Severity: High

ID: 335990

File Name: redhat-RHSA-2026-55560.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 8/17/2026

Updated: 8/17/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.15

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-16524

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-16526

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:pcp-conf, p-cpe:/a:redhat:enterprise_linux:pcp-devel, p-cpe:/a:redhat:enterprise_linux:pcp-doc, p-cpe:/a:redhat:enterprise_linux:pcp-export-pcp2elasticsearch, p-cpe:/a:redhat:enterprise_linux:pcp-export-pcp2graphite, p-cpe:/a:redhat:enterprise_linux:pcp-export-pcp2influxdb, p-cpe:/a:redhat:enterprise_linux:pcp-export-pcp2json, p-cpe:/a:redhat:enterprise_linux:pcp-export-pcp2spark, p-cpe:/a:redhat:enterprise_linux:pcp-export-pcp2xml, p-cpe:/a:redhat:enterprise_linux:pcp-export-pcp2zabbix, p-cpe:/a:redhat:enterprise_linux:pcp-export-zabbix-agent, p-cpe:/a:redhat:enterprise_linux:pcp-gui, p-cpe:/a:redhat:enterprise_linux:pcp-import-collectl2pcp, p-cpe:/a:redhat:enterprise_linux:pcp-import-ganglia2pcp, p-cpe:/a:redhat:enterprise_linux:pcp-import-iostat2pcp, p-cpe:/a:redhat:enterprise_linux:pcp-import-mrtg2pcp, p-cpe:/a:redhat:enterprise_linux:pcp-import-sar2pcp, p-cpe:/a:redhat:enterprise_linux:pcp-libs-devel, p-cpe:/a:redhat:enterprise_linux:pcp-libs, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-activemq, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-apache, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-bash, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-bcc, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-bind2, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-bonding, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-bpftrace, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-cifs, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-cisco, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-dbping, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-denki, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-dm, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-docker, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-ds389, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-ds389log, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-elasticsearch, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-gfs2, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-gluster, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-gpfs, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-gpsd, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-hacluster, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-haproxy, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-infiniband, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-json, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-libvirt, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-lio, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-lmsensors, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-logger, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-lustre, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-lustrecomm, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-mailq, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-memcache, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-mic, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-mongodb, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-mounts, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-mssql, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-mysql, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-named, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-netcheck, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-netfilter, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-news, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-nfsclient, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-nginx, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-nvidia-gpu, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-openmetrics, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-openvswitch, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-oracle, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-pdns, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-perfevent, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-podman, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-postfix, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-postgresql, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-rabbitmq, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-redis, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-roomtemp, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-rsyslog, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-samba, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-sendmail, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-shping, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-slurm, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-smart, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-snmp, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-sockets, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-statsd, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-summary, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-systemd, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-trace, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-unbound, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-weblog, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-zimbra, p-cpe:/a:redhat:enterprise_linux:pcp-pmda-zswap, p-cpe:/a:redhat:enterprise_linux:pcp-selinux, p-cpe:/a:redhat:enterprise_linux:pcp-system-tools, p-cpe:/a:redhat:enterprise_linux:pcp-testsuite, p-cpe:/a:redhat:enterprise_linux:pcp-zeroconf, p-cpe:/a:redhat:enterprise_linux:pcp, p-cpe:/a:redhat:enterprise_linux:perl-pcp-logimport, p-cpe:/a:redhat:enterprise_linux:perl-pcp-logsummary, p-cpe:/a:redhat:enterprise_linux:perl-pcp-mmv, p-cpe:/a:redhat:enterprise_linux:perl-pcp-pmda, p-cpe:/a:redhat:enterprise_linux:python3-pcp

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 8/17/2026

Vulnerability Publication Date: 7/30/2026

Reference Information

CVE: CVE-2026-16524, CVE-2026-16526, CVE-2026-16527, CVE-2026-16529

CWE: 190, 306, 403, 78

RHSA: 2026:55560

Detections

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