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CVE-2026-64225: octeontx2-af: CGX: add bounds check to cgx_speed_mbps index

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-24 · updated 2026-08-12
• Weakness: CWE-129

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: CGX: add bounds check to cgx_speed_mbps index cgx_speed_mbps has 13 elements but RESP_LINKSTAT_SPEED can yield values 0-15. If it returns a value >= 13, this causes an out-of-bounds array access. Add a bounds check and default to speed 0 if the index is out of range.

Affected products

• Linux kernel: from 4.20 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.92; from 6.13 before 6.18.34 — fixed in 5.10.259, 5.15.210, 6.1.176, 6.12.92, 6.18.34, 6.6.143

How to fix

Upgrade to a fixed version: Linux kernel 5.10.259, 5.15.210, 6.1.176, 6.12.92. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2c3d26b4a62454945ba9ef3af3174d3e40e7afef
• https://git.kernel.org/stable/c/47a4cf2229be379cf88f92e32e1240337cd6273f
• https://git.kernel.org/stable/c/8201bf45cc7c1c1a09290c4db8ab1e19801f8fec
• https://git.kernel.org/stable/c/93d3dc81098cd60fb74d434ba7985ddfd9de5acb
• https://git.kernel.org/stable/c/94071141f00bc414e8f8f7f5db3b5143d535299f
• https://git.kernel.org/stable/c/985b5e38ac4f4d5ff03c8bfd8484353b440a1579
• https://git.kernel.org/stable/c/c0bf0a4f3f1f5f57aa83e1400ba4f56f0abfd542
• https://git.kernel.org/stable/c/e043017ac429caee73bd30c5a725659f1a3a4568

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