Medium [CVE-2026-16530] Remote denial of service and information leakage
This medium-severity Red Hat Linux advisory covers CVE-2026-16530 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
A flaw was found in the PCP (Performance Co-Pilot) `pmproxy` service. A remote attacker can exploit a vulnerability in the `pmLogLoadInDom()` function by sending a specially crafted request.
This bypasses a critical bounds check, which can lead to the `pmproxy` service crashing, causing a Denial of Service (DoS). Additionally, this flaw may enable the leakage of sensitive information from the system's memory.
This Moderate impact flaw in the PCP `pmproxy` service allows a remote, unauthenticated attacker to trigger a denial of service or information leakage. The vulnerability stems from a bypassed bounds check in the `pmLogLoadInDom()` function, which can lead to service instability or memory exposure.
Exploitation requires the `pmproxy` service to be reachable on its default TCP port 44322. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).
Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: pcp.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict network access to the `pmproxy` service on TCP port 44322 using firewall rules. Alternatively, if the `pmproxy` service is not required, it can be disabled to prevent exploitation. Example to disable `pmproxy`: `sudo systemctl stop pmproxy` `sudo systemctl disable pmproxy` Note that disabling `pmproxy` may impact functionality that relies on it. A service reload or restart may be required for changes to take effect.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
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