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Performance Co-Pilot CVE-2026-16526

| EUVDEUVD-2026-50971 HIGH
Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak') (CWE-403)
2026-07-30 redhat GHSA-534w-2xfq-h655
RCE 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 Suse
8.8
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

Description requires an existing on-host foothold, so AV:L and PR:L; escalation yields full root, giving C:H/I:H/A:H with unchanged scope.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
7.8 CRITICAL
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Red Hat
8.8 HIGH
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 30, 2026 - 05:50 vuln.today
CVE Published
Jul 30, 2026 - 05:20 cve.org
HIGH 8.8

DescriptionCVE.org

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.

AnalysisAI

Local privilege escalation in Performance Co-Pilot (PCP) on Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 arises from the linux_sockets module exposing an unsecured internal connection. An attacker who already holds low-level code execution on the host can leverage this leaked/unprotected socket to run arbitrary commands as root. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-priv foothold on host
Delivery
Locate exposed PCP internal socket
Exploit
Interact with unsecured linux_sockets endpoint
Execution
Issue commands to privileged PCP process
Impact
Execute arbitrary commands as root
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Vulnerability AssessmentAI

Exploitation Requires that Performance Co-Pilot be installed and running (the linux_sockets module active) on the target, and that the attacker already possess initial code execution / a low-privileged foothold on the same host - this is explicitly stated in the description ('an attacker with initial code execution'). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The supplied CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 8.8) rates this as network-reachable with only low privileges, but the description explicitly requires 'initial code execution' on the host and frames the outcome as privilege escalation to root - signals that point to a local rather than remote attack. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker gains a low-privileged foothold on a RHEL host - for example via a compromised service account, a container escape, or a hijacked CI job - where PCP is running. They locate the unsecured internal connection exposed by the linux_sockets module and interact with the privileged PCP endpoint to issue commands, obtaining arbitrary code execution as root. …
Remediation No vendor-released patch version is identified in the provided data; monitor and apply the Red Hat erratum referenced at https://access.redhat.com/security/cve/CVE-2026-16526 (tracking bug https://bugzilla.redhat.com/show_bug.cgi?id=2506026) as soon as fixed PCP packages are published for your RHEL 6-10 or OpenShift 4 release, then update via dnf/yum. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all systems running PCP on RHEL 6-10 and OpenShift Container Platform 4, prioritizing multi-tenant and high-value environments. …

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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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CVE-2026-16526 vulnerability details – vuln.today
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