{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-72443", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-72443", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-15T05:56:54.601Z", "updatedAt": "2026-08-17T05:14:44.380Z", "importedAt": "2026-10-24T01:58:25.636Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ALSA: usb-audio: Kill MIDI 2.0 URBs before freeing endpoints", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Kill MIDI 2.0 URBs before freeing endpoints\n\nMIDI 2.0 input URBs are started during snd_usb_midi_v2_create(). A\nlater setup failure can still jump to snd_usb_midi_v2_free(), which\ncurrently frees each endpoint and its coherent URB buffers without first\nstopping the submitted URBs. A completion can then dereference the\nembedded URB context and endpoint state after they have been freed, or\ntry to resubmit from the stale endpoint.\n\nThis was observed as a KASAN slab-use-after-free in\ninput_urb_complete().\n\nThe buggy scenario involves two paths, with each column showing the order\nwithin that path:\n\nprobe error path: USB completion path:\n1. start_input_streams() submits 1. The HCD still owns a\n input URBs. submitted input URB.\n2. A later setup helper returns 2. input_urb_complete() runs\n an error. with urb->context in ep.\n3. snd_usb_midi_v2_free() frees 3. The completion reads ep\n endpoint storage and URB buffers. state and can requeue URBs.\n\nMake the endpoint destructor follow the same teardown ordering used for\ndisconnect when the endpoint has not already been disconnected: publish\nep->disconnected, kill the URBs synchronously, and drain the endpoint\nbefore freeing URB buffers and endpoint storage. The guard avoids\nrepeating the stop sequence after the normal\nsnd_usb_midi_v2_disconnect_all() path, while still synchronizing the\ndirect MIDI 2.0 create-error free path.\n\nValidation reproduced this kernel report:\nBUG: KASAN: slab-use-after-free in input_urb_complete+0x37/0x1b0\nWorkqueue: usb_hub_wq hub_event\nRIP: 0010:_raw_spin_unlock_irq+0x2e/0x50\nRead of size 8\nCall trace:\n dump_stack_lvl+0x77/0xb0\n print_report+0xce/0x5f0\n input_urb_complete+0x37/0x1b0 (sound/usb/midi2.c:186)\n srso_alias_return_thunk+0x5/0xfbef5\n __virt_addr_valid+0x19f/0x330\n kasan_report+0xe0/0x110\n __usb_hcd_giveback_urb+0x112/0x1d0\n dummy_timer+0xaaa/0x19a0\n lock_is_held_type+0x9a/0x110\n __lock_acquire+0x467/0x28b0\n mark_held_locks+0x40/0x70\n _raw_spin_unlock_irqrestore+0x44/0x60\n lockdep_hardirqs_on_prepare+0xbb/0x1a0\n __hrtimer_run_queues+0x101/0x520\n hrtimer_run_softirq+0xd0/0x130\n handle_softirqs+0x15b/0x670\n __irq_exit_rcu+0xd0/0x170\n irq_exit_rcu+0xe/0x20\n sysvec_apic_timer_interrupt+0x6c/0x80\n asm_sysvec_apic_timer_interrupt+0x1a/0x20", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d9c99876868c861afd0e9ce2cea407bbc446b3c9", "status": "affected", "versionType": "git", "lessThan": "bcdd5a7363bdd287253c406a9c0205f5722058e7" }, { "version": "d9c99876868c861afd0e9ce2cea407bbc446b3c9", "status": "affected", "versionType": "git", "lessThan": "3d961032a6e58fa485b3a4c0fe0f649334d887de" }, { "version": "d9c99876868c861afd0e9ce2cea407bbc446b3c9", "status": "affected", "versionType": "git", "lessThan": "4c16176fc11a61b7545464cb47c98b0c8a055fcb" }, { "version": "d9c99876868c861afd0e9ce2cea407bbc446b3c9", "status": "affected", "versionType": "git", "lessThan": "68286258698e15fe75073fb8d017003f8e493db1" }, { "version": "d9c99876868c861afd0e9ce2cea407bbc446b3c9", "status": "affected", "versionType": "git", "lessThan": "f199c8a8bdd54296d3458777e70fe82a78bd9817" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.5" }, { "version": "6.6.145", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.97", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.40", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }