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CVE-2026-74527: octeontx2-af: Block VFs from clobbering special CGX PKIND state

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-30

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.

Affected products

• Linux: 4.20 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1106b26e86ac1e7e4d1f634bcd532c5d44e60620
• https://git.kernel.org/stable/c/3bd438a58e910db5dc369aa25dfed1fc95f1b596
• https://git.kernel.org/stable/c/7e888d7dd11519330ba6c6a28391d55891463a6a
• https://git.kernel.org/stable/c/a76243488740a07c81c9adf431685bb7f7c31d8c
• https://git.kernel.org/stable/c/d3c6b0f48f126a36955b3fb4154a59d0b3621d97
• https://git.kernel.org/stable/c/f24f7ce6fb2d1ae080a05371afddba30a3e0b919

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