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CVE-2026-98770

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

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in18138d9f19cf6944ff09f5c8c0930545036fe3d0Also 8294ff75a9de23f7cc641e5e5ca31fa6ea72a574, 87f2185423e01f113811301878f2f67eccec960d and 2 moreCVE List
Published18 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 18138d9f19cf6944ff09f5c8c0930545036fe3d0LinuxCVE List
  • 8294ff75a9de23f7cc641e5e5ca31fa6ea72a574LinuxCVE List
  • 87f2185423e01f113811301878f2f67eccec960dLinuxCVE List
  • 223c3bd02a582776d8ee47dae7b69d3258420694LinuxCVE List
  • 310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 12

  • Linuxaffected: 856fa444b0982746f95e801bab0e586533eb29a3 before 18138d9f19cf6944ff09f5c8c0930545036fe3d0CVE List
  • Linuxaffected: 856fa444b0982746f95e801bab0e586533eb29a3 before 8294ff75a9de23f7cc641e5e5ca31fa6ea72a574CVE List
  • Linuxaffected: 856fa444b0982746f95e801bab0e586533eb29a3 before 87f2185423e01f113811301878f2f67eccec960dCVE List
  • Linuxaffected: 856fa444b0982746f95e801bab0e586533eb29a3 before 223c3bd02a582776d8ee47dae7b69d3258420694CVE List
  • Linuxaffected: 856fa444b0982746f95e801bab0e586533eb29a3 before 310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1CVE List
  • Linuxaffected: 6.6CVE List
  • Linuxunaffected: all versions before 6.6CVE List
  • Linuxunaffected: 6.6.160 through 6.6.*CVE List
  • Linuxunaffected: 6.12.113 through 6.12.*CVE List
  • Linuxunaffected: 6.18.56 through 6.18.*CVE List
  • Linuxunaffected: 7.2.10 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5