Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.4.238, < 4.5 |
References
- https://git.kernel.org/stable/c/09141583bd97f4bbd7358e29fd138fe798467cdbPatch
- https://git.kernel.org/stable/c/3d3b2b01a3e73828e201ece96f863e7a3e0cdc6ePatch
- https://git.kernel.org/stable/c/728ab0c72e49ca27185067984cd565425eb69b2ePatch
- https://git.kernel.org/stable/c/a0226560540c16717efcceaf15c862cf115b01d3Patch
- https://git.kernel.org/stable/c/c59159ce10e75b568cd0d4b29efcb0fb0ddecc94Patch
- https://git.kernel.org/stable/c/c65b137d351e21cbc5630e73ef0eb1e1d75f5b20Patch
- https://git.kernel.org/stable/c/d6854daa67be623860f4e1873fd3d3c275aba4edPatch
- https://git.kernel.org/stable/c/e2f1260a056eb3215c13c48c5378f3e4112dc3afPatch
FAQ
What is CVE-2026-52963?
CVE-2026-52963 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 desc...
How severe is CVE-2026-52963?
CVE-2026-52963 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-52963?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.