Medium [CVE-2026-72312] fix VF bringup affecting PF promiscuous state
This medium-severity Red Hat Linux advisory covers CVE-2026-72312 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.
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Summary
A flaw was found in the Linux kernel's `octeontx2-af` driver. A Virtual Function (VF), which is a virtualized network interface, can inadvertently disable the promiscuous and all-multicast (all_multi) modes of the Physical Function (PF) network interface.
This occurs because the underlying application programming interfaces (APIs) that control these modes operate globally on the PF, even when a request originates from a VF. An attacker with control over a VF could potentially disrupt network traffic monitoring or multicast communication on the PF, leading to a denial of service or information disclosure.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-266.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel-rt.
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 48 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 48 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 48 minutes ago·verify at source
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