{"id":"CVE-2026-98428","state":"PUBLISHED","title":"ALSA: usb: 6fire: Avoid embedded URBs","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb: 6fire: Avoid embedded URBs\n\nThe USB 6fire driver uses URBs embedded in different structs for PCM,\nMIDI and communication, and this is basically a buggy implementation\nnowadays; since a URB is managed with a refcount, this may lead to a\nUAF when the URB is released asynchronously.\n\nFor addressing the problem, this patch converts those embedded URBs to\nones that are properly allocated via usb_alloc_urb().  The\npcm_urb.packets[] is gone, as it's allocated by usb_alloc_urb(), hence\nit's found in urb.iso_frame_desc[] instead.\n\nThe conversions are rather straightforward; each embedded struct urb\nis changed to a pointer, and its callers are updated accordingly.\nThe resource for those structs are released in the common destructor\nfunctions (usb6fire_comm_free(), etc), which are called at both the\ninit error path and the disconnect.\n\nNo functional changes, only compile-tested.","publishedAt":"2026-10-14T13:27:54.364Z","updatedAt":"2026-10-26T06:55:43.958Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"8b8559aeaba2e51cfee1779b2383b085991f7d81","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"52a43c2d57e774489ac3fbbac06ff02f19bd9a52","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"999f433c09e4668412bd68ca207ae2b4af863862","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"d181434549b3da668110a25d743848cce9897f4e","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"9fe49dbc023e82dfaee7b245997d820d01742a9a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/6fire/comm.c","sound/usb/6fire/comm.h","sound/usb/6fire/midi.c","sound/usb/6fire/midi.h","sound/usb/6fire/pcm.c","sound/usb/6fire/pcm.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.39","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/6fire/comm.c","sound/usb/6fire/comm.h","sound/usb/6fire/midi.c","sound/usb/6fire/midi.h","sound/usb/6fire/pcm.c","sound/usb/6fire/pcm.h"]}],"references":["https://git.kernel.org/stable/c/3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a","https://git.kernel.org/stable/c/8b8559aeaba2e51cfee1779b2383b085991f7d81","https://git.kernel.org/stable/c/52a43c2d57e774489ac3fbbac06ff02f19bd9a52","https://git.kernel.org/stable/c/999f433c09e4668412bd68ca207ae2b4af863862","https://git.kernel.org/stable/c/d181434549b3da668110a25d743848cce9897f4e","https://git.kernel.org/stable/c/9fe49dbc023e82dfaee7b245997d820d01742a9a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98428.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98428","state":"PUBLISHED","datePublished":"2026-10-14T13:27:54.364Z","dateUpdated":"2026-10-26T06:55:43.958Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.348Z"},"containers":{"cna":{"title":"ALSA: usb: 6fire: Avoid embedded URBs","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb: 6fire: Avoid embedded URBs\n\nThe USB 6fire driver uses URBs embedded in different structs for PCM,\nMIDI and communication, and this is basically a buggy implementation\nnowadays; since a URB is managed with a refcount, this may lead to a\nUAF when the URB is released asynchronously.\n\nFor addressing the problem, this patch converts those embedded URBs to\nones that are properly allocated via usb_alloc_urb().  The\npcm_urb.packets[] is gone, as it's allocated by usb_alloc_urb(), hence\nit's found in urb.iso_frame_desc[] instead.\n\nThe conversions are rather straightforward; each embedded struct urb\nis changed to a pointer, and its callers are updated accordingly.\nThe resource for those structs are released in the common destructor\nfunctions (usb6fire_comm_free(), etc), which are called at both the\ninit error path and the disconnect.\n\nNo functional changes, only compile-tested."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"8b8559aeaba2e51cfee1779b2383b085991f7d81","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"52a43c2d57e774489ac3fbbac06ff02f19bd9a52","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"999f433c09e4668412bd68ca207ae2b4af863862","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"d181434549b3da668110a25d743848cce9897f4e","versionType":"git"},{"version":"c6d43ba816d1cf1d125bfbfc938f2a28a87facf9","status":"affected","lessThan":"9fe49dbc023e82dfaee7b245997d820d01742a9a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/6fire/comm.c","sound/usb/6fire/comm.h","sound/usb/6fire/midi.c","sound/usb/6fire/midi.h","sound/usb/6fire/pcm.c","sound/usb/6fire/pcm.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.39","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/6fire/comm.c","sound/usb/6fire/comm.h","sound/usb/6fire/midi.c","sound/usb/6fire/midi.h","sound/usb/6fire/pcm.c","sound/usb/6fire/pcm.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a"},{"url":"https://git.kernel.org/stable/c/8b8559aeaba2e51cfee1779b2383b085991f7d81"},{"url":"https://git.kernel.org/stable/c/52a43c2d57e774489ac3fbbac06ff02f19bd9a52"},{"url":"https://git.kernel.org/stable/c/999f433c09e4668412bd68ca207ae2b4af863862"},{"url":"https://git.kernel.org/stable/c/d181434549b3da668110a25d743848cce9897f4e"},{"url":"https://git.kernel.org/stable/c/9fe49dbc023e82dfaee7b245997d820d01742a9a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-26T06:55:43.958Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}