CVE-2026-52964

Summary

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

ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans

The USB MIDI 2.0 endpoint parser has the same descriptor walking pattern as the legacy MIDI parser. It validates bLength against bNumGrpTrmBlock before reading baAssoGrpTrmBlkID[], but not against the remaining bytes in the endpoint-extra scan.

A malformed device can therefore make later baAssoGrpTrmBlkID[] reads consume bytes past the walked descriptor.

Reject zero-length and overlong descriptors while walking endpoint extras.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxff49d1df79aef7580fe3ac99d17c3f886655d080 < fafc97bd01e4c737eaeafadfdadb1af4bbfa7307affected
LinuxLinuxff49d1df79aef7580fe3ac99d17c3f886655d080 < a310b4bebda5e4a1b26520c0cc5145ccd6d617e2affected
LinuxLinuxff49d1df79aef7580fe3ac99d17c3f886655d080 < f9c184a83574549a36ea69b755f650e57d164c78affected
LinuxLinuxff49d1df79aef7580fe3ac99d17c3f886655d080 < 17e76b19de1aff5ff4de64d269290bd1b07a01d3affected
LinuxLinuxff49d1df79aef7580fe3ac99d17c3f886655d080 < 918be519c7876329e1b6e2ea1c59f0b75e792dcaaffected
LinuxLinux6.5affected
LinuxLinux0 < 6.5unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References