Bug 2517028 (CVE-2026-74527) - CVE-2026-74527 kernel: octeontx2-af: Block VFs from clobbering special CGX PKIND state
Summary: CVE-2026-74527 kernel: octeontx2-af: Block VFs from clobbering special CGX PK...
Keywords:
Status: NEW
Alias: CVE-2026-74527
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 12:45 UTC by OSIDB Bzimport
Modified: 2026-08-20 18:27 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-08-15 12:45:24 UTC
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.

Comment 1 Mauro Matteo Cascella 2026-08-20 18:15:50 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081546-CVE-2026-74527-3439@gregkh/T


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