CVE-2026-74527 octeontx2-af: Block VFs from clobbering special CGX PKIND state
A malicious Virtual Function can overwrite critical physical function network parsing configurations, potentially leading to privilege escalation or data manipulation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74527?
CVE-2026-74527 is a high-severity vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-74527?
How do I fix CVE-2026-74527?
Apply the vendor's patch.
Is CVE-2026-74527 being exploited?
There is no known exploitation of CVE-2026-74527 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74527, DEBIAN-CVE-2026-74527, GHSA-vg39-x84f-cgrf, UBUNTU-CVE-2026-74527.