CVE-2026-16526

Pcp: pcp: privilege escalation to root via linux_sockets pmda vulnerability

State: Published
Severity: 8.8 High
Published: Jul 30, 2026
Updated: Oct 1, 2026
Reserved: Jul 22, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	redhat

Weaknesses

CWE-403 Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:7.0.3-5.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:6.3.7-1.el10_0.1 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:5.3.7-22.el8_10.5 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	0:5.2.5-8.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat	0:5.2.5-8.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	0:5.3.5-10.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	0:5.3.5-10.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	0:5.3.7-19.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	0:5.3.7-19.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:6.3.7-8.el9_8.4 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:6.0.1-8.el9_2.2 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:6.2.0-5.el9_4.2 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:6.3.7-1.el9_6.1 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

RHSA-2026:55560vendor-advisory
RHSA-2026:55617vendor-advisory
RHSA-2026:55740vendor-advisory
RHSA-2026:72272vendor-advisory
RHSA-2026:72273vendor-advisory
RHSA-2026:72593vendor-advisory
RHSA-2026:72594vendor-advisory
RHSA-2026:73767vendor-advisory
RHSA-2026:74612vendor-advisory
RHSA-2026:74613vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-16526vdb-entry
RHBZ#2506026issue-tracking

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