--- id: CVE-2026-16524 title: >- A command injection flaw in PCP's linux_sockets PMDA allows malicious shell metacharacters via the network.persocket.filter metric. This failed validation lets attackers execute arbitrary commands as the PMDA user when metrics refresh. summary: >- A command injection flaw in PCP's linux_sockets PMDA allows malicious shell metacharacters via the network.persocket.filter metric. This failed validation lets attackers execute arbitrary commands as the PMDA user when metrics refresh. severity: high cvss: 7.8 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-78 vendor: Red Hat product: pcp affected: - pcp (all versions) - pcp (all versions) - pcp (all versions) - pcp (all versions) - pcp (all versions) - pcp (all versions) - pcp (all versions) - pcp (all versions) - pcp (all versions) - pcp - pcp (all versions) - openshift/ose-rhel-coreos-9 patched: - enterprise_linux_appstream_eus_v_10_0 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_e4s_v_9_2 - enterprise_linux_appstream_e4s_v_9_4 - enterprise_linux_appstream_eus_v_9_6 - enterprise_linux_appstream_v_9 - enterprise_linux_codeready_linux_builder_eus_v_10_0 - enterprise_linux_codeready_linux_builder_v_10 published: '2026-07-30' updated: '2026-10-12' sourceUpdated: '2026-10-12T18:17:22.787' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16524' references: - url: 'https://access.redhat.com/errata/RHSA-2026:55560' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:55617' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:55740' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:72272' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:72273' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:72593' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:72594' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:73767' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:74612' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:74613' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-16524' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2506023' label: secalert@redhat.com - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16524.json - url: 'https://www.cve.org/CVERecord?id=CVE-2026-16524' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16524' tags: - nvd - cve.org - csaf - vex - red-hat epss: 0.00702 epssPercentile: 0.53065 ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-07-30T14:37:48.088368Z' ingestedAt: '2026-09-28T10:07:17.787Z' --- ## Overview A command injection flaw in PCP's linux_sockets PMDA allows malicious shell metacharacters via the network.persocket.filter metric. This failed validation lets attackers execute arbitrary commands as the PMDA user when metrics refresh. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:72273** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-09-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:72273) - **RHSA-2026:55617** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55617) - **RHSA-2026:55560** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55560) - **RHSA-2026:72594** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-09-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:72594) - **RHSA-2026:72593** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-09-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:72593) - **RHSA-2026:72272** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-09-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:72272) - **RHSA-2026:55740** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55740) - **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-09-30 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16524.json) - **RHSA-2026:73767** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:73767)