CVE-2026-80594

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < 67a038c5a7c9bd8aabe6fba8ac9d2e31c0bd5a28affected
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < 6314bd9e2a6b3362998dc85485dd4b0f133a3532affected
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < 76eeeb3a8e3c13d5c0ef28666b57dcb5cc101a32affected
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < e3f93d63dcd48c1f0ba9041f2ffa8aea7170e295affected
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < b847f2725ef47a26b3d01eca3d54fd811e5a544daffected
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < 383934c249a9817d242d02d30bfbc8defbf0d533affected
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < bbbe31486cf2d12177462e4a814244c2597c9849affected
LinuxLinux628329d52474323938a03826941e166bc7c8eff4 < d4579af29e67ca8722db0a1194227f8015c8981daffected
LinuxLinux3.10affected
LinuxLinux0 < 3.10unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References