CVE-2026-98770

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

usb: gadget: midi2: Fix the jack descriptor array sizes

The jack in/out descriptor arrays in struct f_midi2_usb_config have

the size of MAX_CABLES, which look reasonable -- but it turned out to

be incorrect. Namely, the entries for those arrays are added from

both inputs and outputs, hence for each loop cycle, it adds two, ended

up with as twice as the expected size. This inconsistency may result

in potential OOB when a large number of jacks are set up via configfs,

although the max number of cables (the loop count) is limited to

MAX_CABLES.

For addressing it, correct the jack_ins & jack_outs array sizes to

twice, MAX_CABLES * 2.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References