8.8 High

CVE-2026-16526 Pcp: pcp: privilege escalation to root via linux_sockets pmda vulnerability

Description

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.

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Privileges required: Low
Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 10	Versions not published
Red Hat Enterprise Linux 6	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published
Red Hat OpenShift Container Platform 4	Versions not published
Red Hat Enterprise Linux 10.0 Extended Update Support	Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support	Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	Versions not published

Show the 8 other branches

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	Versions not published
Red Hat Enterprise Linux 8.8 Telecommunications Update Service	Versions not published
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	Versions not published
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	Versions not published
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	Versions not published
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	Versions not published
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	Versions not published
Red Hat OpenShift Container Platform 5	Versions not published

References

RHSA-2026:55560 access.redhat.com
RHSA-2026:55617 access.redhat.com
RHSA-2026:55740 access.redhat.com
RHSA-2026:72272 access.redhat.com
RHSA-2026:72273 access.redhat.com
RHSA-2026:72593 access.redhat.com
RHSA-2026:72594 access.redhat.com
RHSA-2026:73767 access.redhat.com
RHSA-2026:74612 access.redhat.com
RHSA-2026:74613 access.redhat.com
access.redhat.com access.redhat.com
RHBZ#2506026 bugzilla.redhat.com

Timeline

Published July 30, 2026
Last modified November 4, 2026

The 1454 CVEs of Red Hat Enterprise Linux 10 →

CVE-2026-123151 Gdb: gdb: stack buffer overflow in parse_tsv_definition via stale rs->buf tail Not rated CVE-2026-121997 Gdb: gdbserver: heap buffer overflow in cmd_qtdpsrc via qtdpsrc declared/actual length mismatch 8.1 High CVE-2026-121996 Gdb: gdbserver: heap disclosure and wild pointer in gdb_parse_agent_expr via untrusted agent-expression length 8.2 High CVE-2026-121995 Gdb: gdb: stack buffer overflow in parse_tracepoint_definition via stale rs->buf tail 7.5 High

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