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

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Summary

CVECVE-2026-52964
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:06 UTC
Updated2026-06-24 17:17:06 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001750000 probability, percentile 0.072030000 (date 2026-06-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ff49d1df79aef7580fe3ac99d17c3f886655d080 fafc97bd01e4c737eaeafadfdadb1af4bbfa7307 git Not specified
CNA Linux Linux affected ff49d1df79aef7580fe3ac99d17c3f886655d080 a310b4bebda5e4a1b26520c0cc5145ccd6d617e2 git Not specified
CNA Linux Linux affected ff49d1df79aef7580fe3ac99d17c3f886655d080 f9c184a83574549a36ea69b755f650e57d164c78 git Not specified
CNA Linux Linux affected ff49d1df79aef7580fe3ac99d17c3f886655d080 17e76b19de1aff5ff4de64d269290bd1b07a01d3 git Not specified
CNA Linux Linux affected ff49d1df79aef7580fe3ac99d17c3f886655d080 918be519c7876329e1b6e2ea1c59f0b75e792dca git Not specified
CNA Linux Linux affected 6.5 Not specified
CNA Linux Linux unaffected 6.5 semver Not specified
CNA Linux Linux unaffected 6.6.141 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f9c184a83574549a36ea69b755f650e57d164c78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/17e76b19de1aff5ff4de64d269290bd1b07a01d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a310b4bebda5e4a1b26520c0cc5145ccd6d617e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fafc97bd01e4c737eaeafadfdadb1af4bbfa7307 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/918be519c7876329e1b6e2ea1c59f0b75e792dca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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