CVE-2026-52963 Details
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.
A vulnerability in the Linux kernel's ALSA USB audio subsystem has been addressed. The issue arises in the handling of MIDI endpoint descriptors, where the validation of descriptor sizes can be bypassed. Specifically, the descriptor walker may return a class-specific endpoint descriptor with a length that exceeds the remaining bytes in the endpoint-extra scan. This discrepancy can lead to flexible-array reads that are only limited by the reported length, not by the actual available bytes, potentially causing memory access issues. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/09141583bd97f4bbd7358e29fd138fe798467cdb | kernel.org | Patch |
| https://git.kernel.org/stable/c/3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e | kernel.org | Patch |
| https://git.kernel.org/stable/c/728ab0c72e49ca27185067984cd565425eb69b2e | kernel.org | Patch |
| https://git.kernel.org/stable/c/a0226560540c16717efcceaf15c862cf115b01d3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c59159ce10e75b568cd0d4b29efcb0fb0ddecc94 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c65b137d351e21cbc5630e73ef0eb1e1d75f5b20 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d6854daa67be623860f4e1873fd3d3c275aba4ed | kernel.org | Patch |
| https://git.kernel.org/stable/c/e2f1260a056eb3215c13c48c5378f3e4112dc3af | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.4.238, < 4.5 >= 4.9.238, < 4.10 >= 4.14.200, < 4.15 >= 4.19.149, < 4.20 >= 5.4.69, < 5.5 >= 5.7, < 5.10.258 >= 5.11, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.141 >= 6.7, < 6.12.91 >= 6.13, < 6.18.33 >= 6.19, < 7.0.10 7.1 rc1 7.1 rc2 7.1 rc3 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 14, 2026 | Initial Analysis | [email protected] |
| Jun 24, 2026 | New CVE Received | kernel.org |