CVE-2026-74527
Received Received - Intake

OcteonTX2 AF Block VF PKIND State Modification

Publication date: 2026-08-15

Last updated on: 2026-08-15

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Block VFs from clobbering special CGX PKIND state PF and VF NIX LFs that share a CGX LMAC reuse the same hardware PKIND programming. When HiGig2 or EDSA parsing is enabled, a VF NIX LF alloc must not reset the LMAC RX PKIND or default TX parse config over the PF setup. Add cgx_get_pkind() and rvu_cgx_is_pkind_config_permitted() so VFs skip cgx_set_pkind(), rvu_npc_set_pkind(), and NIX_AF_LFX_TX_PARSE_CFG updates when the LMAC is using NPC_RX_HIGIG_PKIND or NPC_RX_EDSA_PKIND.

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Meta Information

Published
2026-08-15
Last Modified
2026-08-15
Generated
2026-08-15
AI Q&A
2026-08-15
EPSS Evaluated
N/A
NVD
CVE-2026-74527
EUVD
EUVD-2026-59720

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a flaw in the octeontx2-af driver where Virtual Functions (VFs) can incorrectly modify special hardware PKIND state shared with Physical Functions (PFs). This happens when HiGig2 or EDSA parsing is enabled, potentially disrupting network traffic handling.

Impact Analysis

If exploited, this vulnerability could allow a VF to alter critical network configuration, leading to packet misrouting, dropped connections, or unauthorized access to network traffic. Systems using affected configurations may experience instability or security breaches.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for CVE-2026-74527. Ensure the octeontx2-af driver is updated to prevent VFs from modifying special CGX PKIND state.

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