PT-2026-51857 · Linux · Linux

Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-52963

Mitre

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

ALSA: usb-audio: Bound MIDI endpoint descriptor scans

snd usbmidi get ms info() validates the internal MIDIStreaming endpoint descriptor size before using baAssocJackID[], but the descriptor walker can still return a class-specific endpoint descriptor whose bLength exceeds the remaining bytes in the endpoint-extra scan.

That leaves later flexible-array reads bounded by bLength, but not by the remaining bytes in the endpoint-extra scan.

Stop walking when bLength is zero or extends past the remaining endpoint-extra scan.

Related Identifiers

CVE-2026-52963

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-52963 · Security Note
• https://git.kernel.org/stable/c/e2f1260a056eb3215c13c48c5378f3e4112dc3af · Note
• https://git.kernel.org/stable/c/a0226560540c16717efcceaf15c862cf115b01d3 · Note
• https://git.kernel.org/stable/c/3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e · Note
• https://git.kernel.org/stable/c/c59159ce10e75b568cd0d4b29efcb0fb0ddecc94 · Note
• https://git.kernel.org/stable/c/c65b137d351e21cbc5630e73ef0eb1e1d75f5b20 · Note
• https://git.kernel.org/stable/c/d6854daa67be623860f4e1873fd3d3c275aba4ed · Note
• https://git.kernel.org/stable/c/09141583bd97f4bbd7358e29fd138fe798467cdb · Note
• https://git.kernel.org/stable/c/728ab0c72e49ca27185067984cd565425eb69b2e · Note