Medium [CVE-2026-80994] Open vSwitch: Denial of Service due to use-after-free
This medium-severity Red Hat Linux advisory covers CVE-2026-80994 affecting Red Hat OpenShift Container Platform 4.
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Summary
A flaw was found in the Open vSwitch component of the Linux kernel. A local attacker could exploit a use-after-free vulnerability during flow deletion.
This occurs due to a race condition where the flow mask is freed prematurely, allowing subsequent operations to access deallocated memory. Successful exploitation of this flaw can lead to a system crash, resulting in a Denial of Service (DoS).
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 38 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 38 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 38 minutes ago·verify at source
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