What’s Vulnerable › Vulnerabilities

CVE-2026-46188: octeon_ep_vf: add NULL check for napi_build_skb()

• Severity: medium (CVSS 5.5 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: 2026-05-28 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: octeon_ep_vf: add NULL check for napi_build_skb() napi_build_skb() can return NULL on allocation failure. In __octep_vf_oq_process_rx(), the result is used directly without a NULL check in both the single-buffer and multi-fragment paths, leading to a NULL pointer dereference. Add NULL checks after both napi_build_skb() calls, properly advancing descriptors and consuming remaining fragments on failure.

Affected products

• Linux kernel: from 6.9 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7 — fixed in 6.12.88, 6.18.30, 7.0.7

How to fix

Upgrade to a fixed version: Linux kernel 6.12.88, 6.18.30, 7.0.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/60246cdd4c515ea7d920cddf48932efcb990773e
• https://git.kernel.org/stable/c/6fef6640bbf360e254cc0174365ed30ce3a07572
• https://git.kernel.org/stable/c/b0f4711b426a06fb4c4be85c36b9f5588d5140d3
• https://git.kernel.org/stable/c/dd66b42854705e4e4ee7f14d260f86c578bed3e3

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