CVE-2026-16529
CVE-2026-16529: 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 severityHigh7.5
High [CVE-2026-16529] Denial of Service due to signed integer overflow
CVE-2026-16529Source published Source updated
A signed integer overflow in the PCP __pmGetPDU() function can be exploited via crafted network packets during PDU processing or SASL negotiation. This permanently blinds the affected daemon, resulting in a total denial of service (DoS) for subsequent packet reads. This is an Important denial of service vulnerability in PCP due to a signed integer overflow. An unauthenticated remote attacker could exhaust resources by sending a specially crafted request to the pmlogger or pmcd services, leading to a permanent denial of service for the affected daemon. While both services are typically bound to the loopback interface by default, remote exploitation is possible if the default binding configuration is altered or if PMLOGGER_LOCAL is unset for pmlogger. Red Hat severity: Important — CVSS 7.5…
- 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 mitigate this issue, ensure that Performance Co-Pilot (PCP) services, specifically `pmlogger` and `pmcd`, are not exposed to untrusted networks. By default, these services are configured to listen only on the loopback interface, which prevents remote exploitation. If these default network bindings have been altered, revert them to restrict access to localhost. For `pmlogger`, ensure the `PMLOGGER_LOCAL` environment variable is set. If remote access to PCP services is not required, consider implementing firewall rules to block external connections to TCP ports 4330 (pmlogger) and 44321 (pmcd). Changes to network configurations or environment variables may require restarting the affected PCP services for the mitigation to take effect.
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