{"id":"CVE-2026-52964","state":"PUBLISHED","title":"ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans\n\nThe USB MIDI 2.0 endpoint parser has the same descriptor walking\npattern as the legacy MIDI parser. It validates bLength against\nbNumGrpTrmBlock before reading baAssoGrpTrmBlkID[], but not against the\nremaining bytes in the endpoint-extra scan.\n\nA malformed device can therefore make later baAssoGrpTrmBlkID[] reads\nconsume bytes past the walked descriptor.\n\nReject zero-length and overlong descriptors while walking endpoint\nextras.","publishedAt":"2026-06-24T16:28:44.345Z","updatedAt":"2026-06-24T16:28:44.345Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"fafc97bd01e4c737eaeafadfdadb1af4bbfa7307","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"a310b4bebda5e4a1b26520c0cc5145ccd6d617e2","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"f9c184a83574549a36ea69b755f650e57d164c78","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"17e76b19de1aff5ff4de64d269290bd1b07a01d3","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"918be519c7876329e1b6e2ea1c59f0b75e792dca","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/midi2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/midi2.c"]}],"references":["https://git.kernel.org/stable/c/fafc97bd01e4c737eaeafadfdadb1af4bbfa7307","https://git.kernel.org/stable/c/a310b4bebda5e4a1b26520c0cc5145ccd6d617e2","https://git.kernel.org/stable/c/f9c184a83574549a36ea69b755f650e57d164c78","https://git.kernel.org/stable/c/17e76b19de1aff5ff4de64d269290bd1b07a01d3","https://git.kernel.org/stable/c/918be519c7876329e1b6e2ea1c59f0b75e792dca"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52964.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52964","state":"PUBLISHED","datePublished":"2026-06-24T16:28:44.345Z","dateUpdated":"2026-06-24T16:28:44.345Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.374Z"},"containers":{"cna":{"title":"ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans\n\nThe USB MIDI 2.0 endpoint parser has the same descriptor walking\npattern as the legacy MIDI parser. It validates bLength against\nbNumGrpTrmBlock before reading baAssoGrpTrmBlkID[], but not against the\nremaining bytes in the endpoint-extra scan.\n\nA malformed device can therefore make later baAssoGrpTrmBlkID[] reads\nconsume bytes past the walked descriptor.\n\nReject zero-length and overlong descriptors while walking endpoint\nextras."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"fafc97bd01e4c737eaeafadfdadb1af4bbfa7307","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"a310b4bebda5e4a1b26520c0cc5145ccd6d617e2","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"f9c184a83574549a36ea69b755f650e57d164c78","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"17e76b19de1aff5ff4de64d269290bd1b07a01d3","versionType":"git"},{"version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","status":"affected","lessThan":"918be519c7876329e1b6e2ea1c59f0b75e792dca","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/midi2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/midi2.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fafc97bd01e4c737eaeafadfdadb1af4bbfa7307"},{"url":"https://git.kernel.org/stable/c/a310b4bebda5e4a1b26520c0cc5145ccd6d617e2"},{"url":"https://git.kernel.org/stable/c/f9c184a83574549a36ea69b755f650e57d164c78"},{"url":"https://git.kernel.org/stable/c/17e76b19de1aff5ff4de64d269290bd1b07a01d3"},{"url":"https://git.kernel.org/stable/c/918be519c7876329e1b6e2ea1c59f0b75e792dca"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-24T16:28:44.345Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}