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CVE-2026-46074: spi: ch341: fix memory leaks on probe failures

• 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: 2026-05-27 · updated 2026-06-24
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: spi: ch341: fix memory leaks on probe failures Make sure to deregister the controller, disable pins, and kill and free the RX URB on probe failures to mirror disconnect and avoid memory leaks and use-after-free. Also add an explicit URB kill on disconnect for symmetry (even if that is not strictly required as USB core would have stopped it in the current setup).

Affected products

• Linux kernel: from 6.11 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 — fixed in 6.12.86, 6.18.27, 7.0.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.86, 6.18.27, 7.0.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/5c6518633702d7f7b1153e9d8e042af847f11ef3
• https://git.kernel.org/stable/c/9bee2faf9e21c796d0d222c9d84a98f41bd303a0
• https://git.kernel.org/stable/c/b99e3ddb91b499d920e63a2daff8880be68cfe9e
• https://git.kernel.org/stable/c/ff8a7996dc8bf433efe2126ffdaee5b374a89e30

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