CVE-2026-80594

Description

In the Linux kernel, the following vulnerability has been resolved: Input: ims-pcu - fix potential infinite loop in CDC union descriptor parsing The driver parses CDC union descriptors in ims_pcu_get_cdc_union_desc() by iterating through the extra descriptor data. However, it does not verify that the bLength of each descriptor is at least 2. A malicious device could provide a descriptor with bLength = 0, leading to an infinite loop in the driver. Add a check to ensure bLength is at least 2 before proceeding with parsing.

References

• https://git.kernel.org/stable/c/383934c249a9817d242d02d30bfbc8defbf0d533
• https://git.kernel.org/stable/c/6314bd9e2a6b3362998dc85485dd4b0f133a3532
• https://git.kernel.org/stable/c/67a038c5a7c9bd8aabe6fba8ac9d2e31c0bd5a28
• https://git.kernel.org/stable/c/76eeeb3a8e3c13d5c0ef28666b57dcb5cc101a32
• https://git.kernel.org/stable/c/b847f2725ef47a26b3d01eca3d54fd811e5a544d