CVE-2026-16526
No exploitation reported by the sources we read.
- Published2026-07-30
- WeaknessCWE-403
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2026-07-3006:25CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-16526?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-16526?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- pcpAlmaLinux:10all versions · fixed in 7.0.3-5.el10_2and 110 other packages
- pcpAlmaLinux:9all versions · fixed in 6.3.7-8.el9_8.4and 106 other packages
- pcp-docAlmaLinux:8all versions · fixed in 5.3.7-22.el8_10.5and 77 other packages
Vendor advisories
PCP: PCP: Privilege escalation to root via linux_sockets PMDA vulnerability
pcp-collector as a component of Red Hat Enterprise Linux 6 · pcp-conf as a component of Red Hat Enterprise Linux 6 · pcp-doc as a component of Red Hat Enterprise Linux 6 · +175 more
Red Hat Security Advisory: pcp security update
Red Hat Security Advisory: pcp security update
Red Hat Security Advisory: pcp security update
Red Hat Security Advisory: pcp security update
Red Hat Security Advisory: pcp security update
5 more advisories
Fix
- Vendor fix Red Hat Product Security RHSA-2026:74613 · 778 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
- Workaround from the vendor Red Hat Product Security RHSA-2026:74613 · 778 productsTo mitigate this vulnerability, ensure that the `linux_sockets` PMDA is not configured to load as a Dynamic Shared Object (DSO) within PMCD. The default configuration for this PMDA is daemon mode, which is not affected by this flaw. Review your `pmcd.conf` file to confirm the `linux_sockets` PMDA i…
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2026-07-30
- Last Modified
- 2026-10-02
- NVD status
- Awaiting Analysis
Frequently asked questions
What is CVE-2026-16526?
Is CVE-2026-16526 actively exploited?
What is the CVSS score for CVE-2026-16526?
Running PCP? Hear about its next vulnerability
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.