What’s Vulnerable › Vulnerabilities

CVE-2026-93141: usb: gadget: r8a66597: avoid double free of ep0_req in probe error path

• 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: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: r8a66597: avoid double free of ep0_req in probe error path If usb_add_gadget_udc() fails, r8a66597_probe() jumps to err_add_udc and frees ep0_req, then falls through to clean_up2 where ep0_req is freed again when it is non-NULL. Remove the redundant free from err_add_udc and keep the cleanup in clean_up2 so the request is released exactly once. Issue found using a prototype static analysis tool and confirmed by code review.

Affected products

• Linux kernel: 3.17 — 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/150d3f3c461345b6c9ae784912cf1e49c8e5ff6b
• https://git.kernel.org/stable/c/41d541e3718db01668a4cd29815ee4b3b55f76d2
• https://git.kernel.org/stable/c/6648c470918371766f6d368113dd2a4faebac93f
• https://git.kernel.org/stable/c/6be64cca6527f7fc99b05abf54f22db91bbc116f
• https://git.kernel.org/stable/c/7721cf32efa428bd9649f4a9b89fc85601df87de
• https://git.kernel.org/stable/c/b2e68583c7c51eea2aafb8f1793e0d285c56ac82
• https://git.kernel.org/stable/c/c9e93290ffe7db22a8131a5f5fd026335090fbbe
• https://git.kernel.org/stable/c/f9c43246128a2dd0f2bbad71decf153910ce3606

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