octeontx2-af: fix VF bringup affecting PF promiscuous state (CVE-2026-72312) | HOL Guard CVE

High · CVSS 7.9CVE-2026-72312

octeontx2-af: fix VF bringup affecting PF promiscuous state

Answer in brief

CVE-2026-72312 records a High severity (CVSS 7.9) vulnerability in octeontx2-af: fix VF bringup affecting PF promiscuous state. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Sep 30, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.9
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=967db3529ecac305d230aa4e60abddf6ab63543a <daa2451640a3e0727fd598f5c2ccb8bb4d5a8b9c \|\| >=967db3529ecac305d230aa4e60abddf6ab63543a <212c59e5e416859579272288fd325148fc316109 \|\| >=967db3529ecac305d230aa4e60abddf6ab63543a <53e17d9ed779ad25870abb9c31bc294c71a2278c \|\| >=967db3529ecac305d230aa4e60abddf6ab63543a <3de77d2f34c2bc2acaedabc2c5e0a561b85c283a \|\| >=967db3529ecac305d230aa4e60abddf6ab63543a <3cf83432e0561aef6d7ec2664909d12d0ff0ffc1 \|\| >=967db3529ecac305d230aa4e60abddf6ab63543a <fabb881df322da25442f98d23f5fa371e3c78ec4	daa2451640a3e0727fd598f5c2ccb8bb4d5a8b9c, 212c59e5e416859579272288fd325148fc316109, 53e17d9ed779ad25870abb9c31bc294c71a2278c, 3de77d2f34c2bc2acaedabc2c5e0a561b85c283a, 3cf83432e0561aef6d7ec2664909d12d0ff0ffc1, fabb881df322da25442f98d23f5fa371e3c78ec4
Linux/Linuxgeneric	5.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to daa2451640a3e0727fd598f5c2ccb8bb4d5a8b9c if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: fix VF bringup affecting PF promiscuous state Mbox handling of nix_set_rx_mode for a VF with promiscuous and all_multi flags set to false causes deletion of the PF's promiscuous and allmulti MCAM rules. This occurs because the APIs that enable/disable these rules operate only on the PF, even when the mbox request is made via a VF interface. Guard both rvu_npc_enable_allmulti_entry() and rvu_npc_enable_promisc_entry() disable paths with an is_vf() check so that a VF bringing up or tearing down its interface cannot inadvertently clear the PF's MCAM rules.

Quoted source text, attributed separately from HOL analysis.