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

CVE-2026-98770 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-98770, released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-98770
- Priority: Routine
- CVSS: 6.0 (Moderate)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 18, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98770

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.113-1 | [DEBIAN-CVE-2026-98770](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98770.md) | Oct 19, 2026 |
| Linux | linux Debian 14 | 7.2.10-1 | [DEBIAN-CVE-2026-98770](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98770.md) | Oct 19, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.113-1~deb12u1 | [DEBIAN-CVE-2026-98770](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98770.md) | Oct 19, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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