ALAS2-2026-3857

Amazon Linux 2 Security Advisory: ALAS2-2026-3857
Advisory Released Date: 2026-08-17
Advisory Updated Date: 2026-08-17
Severity: Important
Issue Overview:

A flaw in the PCP linux_sockets module exposes an unsecured internal connection.
An attacker with initial code execution can exploit this to escalate privileges and execute arbitrary commands as root. (CVE-2026-16526)

A signed integer overflow in the PCP __pmGetPDU() function can be exploited via crafted network packets during PDU processing or SASL negotiation. This permanently blinds the affected daemon, resulting in a total denial of service (DoS) for subsequent packet reads. (CVE-2026-16529)


Affected Packages:

pcp


Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.


Issue Correction:
Run yum update pcp or yum update --advisory ALAS2-2026-3857 to update your system.

New Packages:
aarch64:
    pcp-4.3.2-12.amzn2.0.3.aarch64
    pcp-conf-4.3.2-12.amzn2.0.3.aarch64
    pcp-libs-4.3.2-12.amzn2.0.3.aarch64
    pcp-libs-devel-4.3.2-12.amzn2.0.3.aarch64
    pcp-devel-4.3.2-12.amzn2.0.3.aarch64
    pcp-testsuite-4.3.2-12.amzn2.0.3.aarch64
    pcp-manager-4.3.2-12.amzn2.0.3.aarch64
    pcp-webapi-4.3.2-12.amzn2.0.3.aarch64
    perl-PCP-PMDA-4.3.2-12.amzn2.0.3.aarch64
    perl-PCP-MMV-4.3.2-12.amzn2.0.3.aarch64
    perl-PCP-LogImport-4.3.2-12.amzn2.0.3.aarch64
    perl-PCP-LogSummary-4.3.2-12.amzn2.0.3.aarch64
    pcp-import-sar2pcp-4.3.2-12.amzn2.0.3.aarch64
    pcp-import-iostat2pcp-4.3.2-12.amzn2.0.3.aarch64
    pcp-import-mrtg2pcp-4.3.2-12.amzn2.0.3.aarch64
    pcp-import-ganglia2pcp-4.3.2-12.amzn2.0.3.aarch64
    pcp-import-collectl2pcp-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-zabbix-agent-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-pcp2elasticsearch-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-pcp2graphite-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-pcp2influxdb-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-pcp2json-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-pcp2spark-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-pcp2xml-4.3.2-12.amzn2.0.3.aarch64
    pcp-export-pcp2zabbix-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-perfevent-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-infiniband-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-activemq-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-bind2-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-redis-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-bonding-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-dbping-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-ds389-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-ds389log-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-gpfs-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-gpsd-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-docker-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-lustre-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-lustrecomm-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-memcache-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-mysql-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-named-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-netfilter-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-news-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-nginx-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-oracle-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-pdns-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-postfix-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-rsyslog-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-samba-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-slurm-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-snmp-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-vmware-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-zimbra-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-dm-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-gluster-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-nfsclient-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-postgresql-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-zswap-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-unbound-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-mic-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-haproxy-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-libvirt-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-elasticsearch-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-lio-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-prometheus-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-lmsensors-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-json-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-apache-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-bash-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-cifs-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-cisco-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-gfs2-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-logger-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-mailq-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-mounts-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-nvidia-gpu-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-roomtemp-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-rpm-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-sendmail-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-shping-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-smart-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-summary-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-systemd-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-trace-4.3.2-12.amzn2.0.3.aarch64
    pcp-pmda-weblog-4.3.2-12.amzn2.0.3.aarch64
    pcp-zeroconf-4.3.2-12.amzn2.0.3.aarch64
    python-pcp-4.3.2-12.amzn2.0.3.aarch64
    pcp-system-tools-4.3.2-12.amzn2.0.3.aarch64
    pcp-gui-4.3.2-12.amzn2.0.3.aarch64
    pcp-selinux-4.3.2-12.amzn2.0.3.aarch64
    pcp-debuginfo-4.3.2-12.amzn2.0.3.aarch64

i686:
    pcp-4.3.2-12.amzn2.0.3.i686
    pcp-conf-4.3.2-12.amzn2.0.3.i686
    pcp-libs-4.3.2-12.amzn2.0.3.i686
    pcp-libs-devel-4.3.2-12.amzn2.0.3.i686
    pcp-devel-4.3.2-12.amzn2.0.3.i686
    pcp-testsuite-4.3.2-12.amzn2.0.3.i686
    pcp-manager-4.3.2-12.amzn2.0.3.i686
    pcp-webapi-4.3.2-12.amzn2.0.3.i686
    perl-PCP-PMDA-4.3.2-12.amzn2.0.3.i686
    perl-PCP-MMV-4.3.2-12.amzn2.0.3.i686
    perl-PCP-LogImport-4.3.2-12.amzn2.0.3.i686
    perl-PCP-LogSummary-4.3.2-12.amzn2.0.3.i686
    pcp-import-sar2pcp-4.3.2-12.amzn2.0.3.i686
    pcp-import-iostat2pcp-4.3.2-12.amzn2.0.3.i686
    pcp-import-mrtg2pcp-4.3.2-12.amzn2.0.3.i686
    pcp-import-ganglia2pcp-4.3.2-12.amzn2.0.3.i686
    pcp-import-collectl2pcp-4.3.2-12.amzn2.0.3.i686
    pcp-export-zabbix-agent-4.3.2-12.amzn2.0.3.i686
    pcp-export-pcp2elasticsearch-4.3.2-12.amzn2.0.3.i686
    pcp-export-pcp2graphite-4.3.2-12.amzn2.0.3.i686
    pcp-export-pcp2influxdb-4.3.2-12.amzn2.0.3.i686
    pcp-export-pcp2json-4.3.2-12.amzn2.0.3.i686
    pcp-export-pcp2spark-4.3.2-12.amzn2.0.3.i686
    pcp-export-pcp2xml-4.3.2-12.amzn2.0.3.i686
    pcp-export-pcp2zabbix-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-perfevent-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-infiniband-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-activemq-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-bind2-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-redis-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-bonding-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-dbping-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-ds389-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-ds389log-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-gpfs-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-gpsd-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-docker-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-lustre-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-lustrecomm-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-memcache-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-mysql-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-named-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-netfilter-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-news-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-nginx-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-oracle-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-pdns-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-postfix-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-rsyslog-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-samba-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-slurm-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-snmp-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-vmware-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-zimbra-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-dm-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-gluster-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-nfsclient-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-postgresql-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-zswap-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-unbound-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-mic-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-haproxy-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-libvirt-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-elasticsearch-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-lio-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-prometheus-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-lmsensors-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-json-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-apache-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-bash-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-cifs-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-cisco-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-gfs2-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-logger-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-mailq-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-mounts-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-nvidia-gpu-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-roomtemp-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-rpm-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-sendmail-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-shping-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-smart-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-summary-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-systemd-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-trace-4.3.2-12.amzn2.0.3.i686
    pcp-pmda-weblog-4.3.2-12.amzn2.0.3.i686
    pcp-zeroconf-4.3.2-12.amzn2.0.3.i686
    python-pcp-4.3.2-12.amzn2.0.3.i686
    pcp-system-tools-4.3.2-12.amzn2.0.3.i686
    pcp-gui-4.3.2-12.amzn2.0.3.i686
    pcp-selinux-4.3.2-12.amzn2.0.3.i686
    pcp-debuginfo-4.3.2-12.amzn2.0.3.i686

noarch:
    pcp-webjs-4.3.2-12.amzn2.0.3.noarch
    pcp-webapp-vector-4.3.2-12.amzn2.0.3.noarch
    pcp-webapp-grafana-4.3.2-12.amzn2.0.3.noarch
    pcp-webapp-graphite-4.3.2-12.amzn2.0.3.noarch
    pcp-webapp-blinkenlights-4.3.2-12.amzn2.0.3.noarch
    pcp-doc-4.3.2-12.amzn2.0.3.noarch

src:
    pcp-4.3.2-12.amzn2.0.3.src

x86_64:
    pcp-4.3.2-12.amzn2.0.3.x86_64
    pcp-conf-4.3.2-12.amzn2.0.3.x86_64
    pcp-libs-4.3.2-12.amzn2.0.3.x86_64
    pcp-libs-devel-4.3.2-12.amzn2.0.3.x86_64
    pcp-devel-4.3.2-12.amzn2.0.3.x86_64
    pcp-testsuite-4.3.2-12.amzn2.0.3.x86_64
    pcp-manager-4.3.2-12.amzn2.0.3.x86_64
    pcp-webapi-4.3.2-12.amzn2.0.3.x86_64
    perl-PCP-PMDA-4.3.2-12.amzn2.0.3.x86_64
    perl-PCP-MMV-4.3.2-12.amzn2.0.3.x86_64
    perl-PCP-LogImport-4.3.2-12.amzn2.0.3.x86_64
    perl-PCP-LogSummary-4.3.2-12.amzn2.0.3.x86_64
    pcp-import-sar2pcp-4.3.2-12.amzn2.0.3.x86_64
    pcp-import-iostat2pcp-4.3.2-12.amzn2.0.3.x86_64
    pcp-import-mrtg2pcp-4.3.2-12.amzn2.0.3.x86_64
    pcp-import-ganglia2pcp-4.3.2-12.amzn2.0.3.x86_64
    pcp-import-collectl2pcp-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-zabbix-agent-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-pcp2elasticsearch-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-pcp2graphite-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-pcp2influxdb-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-pcp2json-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-pcp2spark-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-pcp2xml-4.3.2-12.amzn2.0.3.x86_64
    pcp-export-pcp2zabbix-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-perfevent-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-infiniband-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-activemq-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-bind2-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-redis-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-bonding-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-dbping-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-ds389-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-ds389log-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-gpfs-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-gpsd-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-docker-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-lustre-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-lustrecomm-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-memcache-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-mysql-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-named-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-netfilter-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-news-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-nginx-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-oracle-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-pdns-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-postfix-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-rsyslog-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-samba-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-slurm-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-snmp-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-vmware-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-zimbra-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-dm-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-gluster-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-nfsclient-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-postgresql-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-zswap-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-unbound-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-mic-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-haproxy-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-libvirt-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-elasticsearch-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-lio-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-prometheus-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-lmsensors-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-json-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-apache-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-bash-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-cifs-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-cisco-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-gfs2-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-logger-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-mailq-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-mounts-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-nvidia-gpu-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-roomtemp-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-rpm-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-sendmail-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-shping-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-smart-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-summary-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-systemd-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-trace-4.3.2-12.amzn2.0.3.x86_64
    pcp-pmda-weblog-4.3.2-12.amzn2.0.3.x86_64
    pcp-zeroconf-4.3.2-12.amzn2.0.3.x86_64
    python-pcp-4.3.2-12.amzn2.0.3.x86_64
    pcp-system-tools-4.3.2-12.amzn2.0.3.x86_64
    pcp-gui-4.3.2-12.amzn2.0.3.x86_64
    pcp-selinux-4.3.2-12.amzn2.0.3.x86_64
    pcp-debuginfo-4.3.2-12.amzn2.0.3.x86_64

Additional References

Release Notes:  Amazon Linux 2 Release Notes

Red Hat: CVE-2026-16526, CVE-2026-16529

Mitre: CVE-2026-16526, CVE-2026-16529