{"api_version":"1","generated_at":"2026-08-16T05:53:46+00:00","cve":"CVE-2026-74501","urls":{"html":"https://cve.report/CVE-2026-74501","api":"https://cve.report/api/cve/CVE-2026-74501.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74501","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74501"},"summary":{"title":"ALSA: usb-audio: fix use-after-free in ump_to_endpoint()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix use-after-free in ump_to_endpoint()\n\ncreate_midi2_ump() registers a card-owned snd_ump_endpoint and stores a\nback-pointer to its per-interface snd_usb_midi2_ump object in\nump->private_data, but it never installs an ump->private_free hook and\nnever clears that pointer.\n\nIf a later step of snd_usb_midi_v2_create() fails, its error path calls\nfree_all_midi2_umps(), which kfree()s the snd_usb_midi2_ump object while\nthe already-registered endpoint keeps pointing at it.  The created\n/dev/snd/umpC*D* node stays exposed, so the first operation of any UMP\nopen, ump_to_endpoint(), dereferences the dangling ump->private_data and\nreads rmidi->eps[dir] out of freed memory.\n\nA malicious USB MIDI 2.0 device that makes creation fail after the\nendpoint is registered can thus trigger a slab use-after-free read on a\nsubsequent open of the UMP node.\n\nClear the endpoint's back-pointer before freeing the object, and let\nump_to_endpoint() tolerate a NULL private_data so the open/close/trigger\ncallbacks fail cleanly (their callers already handle a NULL endpoint)\ninstead of dereferencing a stale pointer.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:17:55","updated_at":"2026-08-15 13:17:55"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/cc014ebf803174f0e5d15956dfc5a38413c945ae","name":"https://git.kernel.org/stable/c/cc014ebf803174f0e5d15956dfc5a38413c945ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8a7a33b846d6ba695891b8d0040027cdbad8cd52","name":"https://git.kernel.org/stable/c/8a7a33b846d6ba695891b8d0040027cdbad8cd52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37","name":"https://git.kernel.org/stable/c/49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ae388c0e1bf727972096f770f82d12e4f748d1b6","name":"https://git.kernel.org/stable/c/ae388c0e1bf727972096f770f82d12e4f748d1b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4a05b2d1b4642df74f30b6f54843e825c4a2bfd3","name":"https://git.kernel.org/stable/c/4a05b2d1b4642df74f30b6f54843e825c4a2bfd3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74501","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74501","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff49d1df79aef7580fe3ac99d17c3f886655d080 49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff49d1df79aef7580fe3ac99d17c3f886655d080 8a7a33b846d6ba695891b8d0040027cdbad8cd52 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff49d1df79aef7580fe3ac99d17c3f886655d080 cc014ebf803174f0e5d15956dfc5a38413c945ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff49d1df79aef7580fe3ac99d17c3f886655d080 ae388c0e1bf727972096f770f82d12e4f748d1b6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff49d1df79aef7580fe3ac99d17c3f886655d080 4a05b2d1b4642df74f30b6f54843e825c4a2bfd3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc6 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/usb/midi2.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37","status":"affected","version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","versionType":"git"},{"lessThan":"8a7a33b846d6ba695891b8d0040027cdbad8cd52","status":"affected","version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","versionType":"git"},{"lessThan":"cc014ebf803174f0e5d15956dfc5a38413c945ae","status":"affected","version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","versionType":"git"},{"lessThan":"ae388c0e1bf727972096f770f82d12e4f748d1b6","status":"affected","version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","versionType":"git"},{"lessThan":"4a05b2d1b4642df74f30b6f54843e825c4a2bfd3","status":"affected","version":"ff49d1df79aef7580fe3ac99d17c3f886655d080","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/usb/midi2.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.5"},{"lessThan":"6.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc6","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc6","versionStartIncluding":"6.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix use-after-free in ump_to_endpoint()\n\ncreate_midi2_ump() registers a card-owned snd_ump_endpoint and stores a\nback-pointer to its per-interface snd_usb_midi2_ump object in\nump->private_data, but it never installs an ump->private_free hook and\nnever clears that pointer.\n\nIf a later step of snd_usb_midi_v2_create() fails, its error path calls\nfree_all_midi2_umps(), which kfree()s the snd_usb_midi2_ump object while\nthe already-registered endpoint keeps pointing at it.  The created\n/dev/snd/umpC*D* node stays exposed, so the first operation of any UMP\nopen, ump_to_endpoint(), dereferences the dangling ump->private_data and\nreads rmidi->eps[dir] out of freed memory.\n\nA malicious USB MIDI 2.0 device that makes creation fail after the\nendpoint is registered can thus trigger a slab use-after-free read on a\nsubsequent open of the UMP node.\n\nClear the endpoint's back-pointer before freeing the object, and let\nump_to_endpoint() tolerate a NULL private_data so the open/close/trigger\ncallbacks fail cleanly (their callers already handle a NULL endpoint)\ninstead of dereferencing a stale pointer.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>"}],"providerMetadata":{"dateUpdated":"2026-08-15T12:27:26.957Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37"},{"url":"https://git.kernel.org/stable/c/8a7a33b846d6ba695891b8d0040027cdbad8cd52"},{"url":"https://git.kernel.org/stable/c/cc014ebf803174f0e5d15956dfc5a38413c945ae"},{"url":"https://git.kernel.org/stable/c/ae388c0e1bf727972096f770f82d12e4f748d1b6"},{"url":"https://git.kernel.org/stable/c/4a05b2d1b4642df74f30b6f54843e825c4a2bfd3"}],"title":"ALSA: usb-audio: fix use-after-free in ump_to_endpoint()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74501","datePublished":"2026-08-15T12:27:26.957Z","dateReserved":"2026-08-15T05:44:03.907Z","dateUpdated":"2026-08-15T12:27:26.957Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:17:55","lastModifiedDate":"2026-08-15 13:17:55","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74501","Ordinal":"1","Title":"ALSA: usb-audio: fix use-after-free in ump_to_endpoint()","CVE":"CVE-2026-74501","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74501","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix use-after-free in ump_to_endpoint()\n\ncreate_midi2_ump() registers a card-owned snd_ump_endpoint and stores a\nback-pointer to its per-interface snd_usb_midi2_ump object in\nump->private_data, but it never installs an ump->private_free hook and\nnever clears that pointer.\n\nIf a later step of snd_usb_midi_v2_create() fails, its error path calls\nfree_all_midi2_umps(), which kfree()s the snd_usb_midi2_ump object while\nthe already-registered endpoint keeps pointing at it.  The created\n/dev/snd/umpC*D* node stays exposed, so the first operation of any UMP\nopen, ump_to_endpoint(), dereferences the dangling ump->private_data and\nreads rmidi->eps[dir] out of freed memory.\n\nA malicious USB MIDI 2.0 device that makes creation fail after the\nendpoint is registered can thus trigger a slab use-after-free read on a\nsubsequent open of the UMP node.\n\nClear the endpoint's back-pointer before freeing the object, and let\nump_to_endpoint() tolerate a NULL private_data so the open/close/trigger\ncallbacks fail cleanly (their callers already handle a NULL endpoint)\ninstead of dereferencing a stale pointer.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>","Type":"Description","Title":"ALSA: usb-audio: fix use-after-free in ump_to_endpoint()"}]}}}