What’s Vulnerable › Vulnerabilities

CVE-2026-93278: staging: octeon: add missing napi_disable in cvm_oct_rx_shutdown

• Severity: unknown
• 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: 2026-09-24 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: staging: octeon: add missing napi_disable in cvm_oct_rx_shutdown cvm_oct_rx_shutdown calls free_irq and netif_napi_del without disabling the napi instance first. As the free_irq only waits for completion of hard interrupt handlers, the napi poll function could still be active. If cvm_oct_remove proceeds to free the plat structure (which holds the NAPI instances), the active poll function will access freed memory, resulting in a use-after-free crash.

Affected products

• Linux kernel: 2.6.34 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/158389d7af04bbf0664d91c2ce31fcc9eeace1eb
• https://git.kernel.org/stable/c/89f9f433271fad9351de6a3c713b45b2cfb23e4a
• https://git.kernel.org/stable/c/98f9036b2254c928cb44da0c77dba38f66f7d8f1
• https://git.kernel.org/stable/c/b2243ffaac14cc3639b5b32a371aac37f96ee554
• https://git.kernel.org/stable/c/b38fbd68cc36b4f478a1e3cfc169b8616ae1337d
• https://git.kernel.org/stable/c/c0a9a8586a63fda49e61a6b83360feac2a60d898
• https://git.kernel.org/stable/c/c124049c3a7006fd6caf629139a5722610bbffb4

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