CVE-2026-16524
CVE-2026-16524: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.8
High [CVE-2026-16524] PCP linux_sockets PMDA: Arbitrary Command Execution via Command Injection
CVE-2026-16524Source published Source updated
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. This flaw is rated as Important because it allows a local attacker to achieve arbitrary command execution as the PMDA process user within the Performance Co-Pilot (PCP) environment. Exploitation requires the `linux_sockets` PMDA to be loaded and the `ss` utility to be present, which are common configurations. The vulnerability stems from an inverted validation logic in the `sockets_check_filter()` function, enabling the injection of malicious shell metacharacters into a filter value that is later executed. Red Hat severity: Important — CVSS 7.8…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 6
2 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- pcp-0:7.0.3-5.el10_2
- pcp-0:5.3.7-22.el8_10.5
- pcp-0:6.3.7-8.el9_8.4
- RHSA-2026:55617
2 more entries in the full advisory.
- Mitigation guidance
- To prevent exploitation, restrict access to the `pmstore` utility by configuring the `[access]` section in `/etc/pcp/pmcd/pmcd.conf`. If the `linux_sockets` PMDA is not essential, it can be unloaded or disabled to remove the attack vector. After modifying `pmcd.conf`, the `pmcd` service must be restarted for changes to take effect.
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