Medium [CVE-2026-89504] Linux kernel: Dangling pointer in regulator subsystem can lead to denial of service.
This medium-severity Red Hat Linux advisory covers CVE-2026-89504 affecting Red Hat OpenShift Container Platform 4.
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Summary
A flaw was found in the Linux kernel's regulator subsystem. This vulnerability arises from a programming error where a device tree node pointer is released too early, creating a "dangling pointer"—a reference to memory that is no longer valid.
This can lead to system instability, potentially causing the system to crash, resulting in a Denial of Service (DoS). In some scenarios, this type of memory corruption could also be exploited by a local attacker to achieve arbitrary code execution.
Red Hat severity: Moderate — CVSS 4.1 (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-825.
Affected Red Hat products: Red Hat OpenShift Container Platform 4. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 24 minutes 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 · medium-confidence parse· fetched 24 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 24 minutes ago·verify at source
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