CVEvulnerability
CVE-2026-98770
- Status
- Received
- Published
- 2026-10-18
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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.
References
- https://git.kernel.org/stable/c/18138d9f19cf6944ff09f5c8c0930545036fe3d0 git.kernel.org
- https://git.kernel.org/stable/c/223c3bd02a582776d8ee47dae7b69d3258420694 git.kernel.org
- https://git.kernel.org/stable/c/310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1 git.kernel.org
- https://git.kernel.org/stable/c/8294ff75a9de23f7cc641e5e5ca31fa6ea72a574 git.kernel.org
- https://git.kernel.org/stable/c/87f2185423e01f113811301878f2f67eccec960d git.kernel.org