CVE-2026-16526

HIGH

8.8

CVSS v3

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.

CWE-403

How to fix

Remediation Available

pcpDebian

Fixed in:7.2.0-1CVE-2026-16526

pcpRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcpRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-confRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-confRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-debuginfoRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-debuginfoRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-debugsourceRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-debugsourceRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-develRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-develRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-devel-debuginfoRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-devel-debuginfoRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-docRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

Fixed in:0:6.3.7-8.el9_8.4RHSA-2026:55740

pcp-docRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

Fixed in:0:6.3.7-8.el9_8.4RHSA-2026:55740

pcp-export-pcp2elasticsearchRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2elasticsearchRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2graphiteRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2graphiteRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2influxdbRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2influxdbRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2jsonRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2jsonRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2openmetricsRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:6.3.7-8.el9_8.4RHSA-2026:55740

pcp-export-pcp2openmetricsRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:6.3.7-8.el9_8.4RHSA-2026:55740

pcp-export-pcp2opentelemetryRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

pcp-export-pcp2opentelemetryRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

pcp-export-pcp2sparkRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2sparkRocky

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

pcp-export-pcp2xmlRed Hat / RHEL

Fixed in:0:7.0.3-5.el10_2RHSA-2026:55617

Fixed in:0:5.3.7-22.el8_10.5RHSA-2026:55560

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.45%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% of all known CVEs.

References

Other references5

Related Vulnerabilities

Other CWE-403 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-21626	High	8.6	18%	-	Fix
CVE-2024-58280	High	8.8	0.9%	-	-
CVE-2025-15114	Critical	9.8	0.6%	-	-
CVE-2026-12296	Critical	9.6	0.4%	-	Fix
CVE-2025-3032	High	7.4	0.4%	-	Fix
CVE-2026-40042	Critical	9.8	0.4%	-	-

Common questions

How do I fix CVE-2026-16526?

Published advisories record a fix for 269 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-16526 being actively exploited?

Not that we know of. CVE-2026-16526 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.45% is the estimated probability that it will be exploited in the next 30 days. That is higher than 38% of all scored CVEs.

How severe is CVE-2026-16526?

CVE-2026-16526 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-16526 affect?

Published advisories record a fix for pcp (Debian), pcp (Rocky), pcp (Red Hat / RHEL), pcp-conf (Rocky), and 265 more. The list on this page is capped, so there may be more.

Embed a live status badge for CVE-2026-16526

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-21.