{"id":"CVE-2026-31581","state":"PUBLISHED","title":"ALSA: 6fire: fix use-after-free on disconnect","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: 6fire: fix use-after-free on disconnect\n\nIn usb6fire_chip_abort(), the chip struct is allocated as the card's\nprivate data (via snd_card_new with sizeof(struct sfire_chip)).  When\nsnd_card_free_when_closed() is called and no file handles are open, the\ncard and embedded chip are freed synchronously.  The subsequent\nchip->card = NULL write then hits freed slab memory.\n\nCall trace:\n  usb6fire_chip_abort sound/usb/6fire/chip.c:59 [inline]\n  usb6fire_chip_disconnect+0x348/0x358 sound/usb/6fire/chip.c:182\n  usb_unbind_interface+0x1a8/0x88c drivers/usb/core/driver.c:458\n  ...\n  hub_event+0x1a04/0x4518 drivers/usb/core/hub.c:5953\n\nFix by moving the card lifecycle out of usb6fire_chip_abort() and into\nusb6fire_chip_disconnect().  The card pointer is saved in a local\nbefore any teardown, snd_card_disconnect() is called first to prevent\nnew opens, URBs are aborted while chip is still valid, and\nsnd_card_free_when_closed() is called last so chip is never accessed\nafter the card may be freed.","publishedAt":"2026-04-24T14:42:11.557Z","updatedAt":"2026-06-14T17:42:07.970Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f2d06d4e129e2508e356136f99bb20a332ff1a00","status":"affected","lessThan":"e719232f4552e29de8027a83918ea94434be87af","versionType":"git"},{"version":"b889a7d68d7e76b8795b754a75c91a2d561d5e8c","status":"affected","lessThan":"e247a0e01d15ed420f77ec5e2335721bf430a5b3","versionType":"git"},{"version":"ea8cc56db659cf0ae57073e32a4735ead7bd7ee3","status":"affected","lessThan":"ba88461f7653636c48321ca993006a74724c2f41","versionType":"git"},{"version":"b754e831a94f82f2593af806741392903f359168","status":"affected","lessThan":"e88354b381e2006de63d6b052ed7005c9a47d00e","versionType":"git"},{"version":"57860a80f03f9dc69a34a5c37b0941ad032a0a8c","status":"affected","lessThan":"af75b486f7e883e3422ece23c8d727e6815144a0","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"d21e8a2af4869b5890b34e081d5aeadc93e9cd5c","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"3dc20d1981d6a67d8184498a5da272942dde1e65","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"51f6532790b74ffdd6970bc848358a2838c1c185","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"b9c826916fdce6419b94eb0cd8810fdac18c2386","versionType":"git"},{"version":"74357d0b5cd3ef544752bc9f21cbeee4902fae6c","status":"affected","versionType":"git"},{"version":"273eec23467dfbfbd0e4c10302579ba441fb1e13","status":"affected","versionType":"git"},{"version":"0df7f4b5cc10f5adf98be0845372e9eef7bb5b09","status":"affected","versionType":"git"},{"version":"5.10.231","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.174","status":"affected","lessThan":"5.15.209","versionType":"semver"},{"version":"6.1.120","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.64","status":"affected","lessThan":"6.6.136","versionType":"semver"},{"version":"6.12.2","status":"affected","lessThan":"6.12.83","versionType":"semver"},{"version":"4.19.325","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.287","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.11.11","status":"affected","lessThan":"6.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/6fire/chip.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","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/6fire/chip.c"]}],"references":["https://git.kernel.org/stable/c/e719232f4552e29de8027a83918ea94434be87af","https://git.kernel.org/stable/c/e247a0e01d15ed420f77ec5e2335721bf430a5b3","https://git.kernel.org/stable/c/ba88461f7653636c48321ca993006a74724c2f41","https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e","https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0","https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5c","https://git.kernel.org/stable/c/3dc20d1981d6a67d8184498a5da272942dde1e65","https://git.kernel.org/stable/c/51f6532790b74ffdd6970bc848358a2838c1c185","https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31581.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31581","state":"PUBLISHED","datePublished":"2026-04-24T14:42:11.557Z","dateUpdated":"2026-06-14T17:42:07.970Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.119Z"},"containers":{"cna":{"title":"ALSA: 6fire: fix use-after-free on disconnect","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: 6fire: fix use-after-free on disconnect\n\nIn usb6fire_chip_abort(), the chip struct is allocated as the card's\nprivate data (via snd_card_new with sizeof(struct sfire_chip)).  When\nsnd_card_free_when_closed() is called and no file handles are open, the\ncard and embedded chip are freed synchronously.  The subsequent\nchip->card = NULL write then hits freed slab memory.\n\nCall trace:\n  usb6fire_chip_abort sound/usb/6fire/chip.c:59 [inline]\n  usb6fire_chip_disconnect+0x348/0x358 sound/usb/6fire/chip.c:182\n  usb_unbind_interface+0x1a8/0x88c drivers/usb/core/driver.c:458\n  ...\n  hub_event+0x1a04/0x4518 drivers/usb/core/hub.c:5953\n\nFix by moving the card lifecycle out of usb6fire_chip_abort() and into\nusb6fire_chip_disconnect().  The card pointer is saved in a local\nbefore any teardown, snd_card_disconnect() is called first to prevent\nnew opens, URBs are aborted while chip is still valid, and\nsnd_card_free_when_closed() is called last so chip is never accessed\nafter the card may be freed."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f2d06d4e129e2508e356136f99bb20a332ff1a00","status":"affected","lessThan":"e719232f4552e29de8027a83918ea94434be87af","versionType":"git"},{"version":"b889a7d68d7e76b8795b754a75c91a2d561d5e8c","status":"affected","lessThan":"e247a0e01d15ed420f77ec5e2335721bf430a5b3","versionType":"git"},{"version":"ea8cc56db659cf0ae57073e32a4735ead7bd7ee3","status":"affected","lessThan":"ba88461f7653636c48321ca993006a74724c2f41","versionType":"git"},{"version":"b754e831a94f82f2593af806741392903f359168","status":"affected","lessThan":"e88354b381e2006de63d6b052ed7005c9a47d00e","versionType":"git"},{"version":"57860a80f03f9dc69a34a5c37b0941ad032a0a8c","status":"affected","lessThan":"af75b486f7e883e3422ece23c8d727e6815144a0","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"d21e8a2af4869b5890b34e081d5aeadc93e9cd5c","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"3dc20d1981d6a67d8184498a5da272942dde1e65","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"51f6532790b74ffdd6970bc848358a2838c1c185","versionType":"git"},{"version":"a0810c3d6dd2d29a9b92604d682eacd2902ce947","status":"affected","lessThan":"b9c826916fdce6419b94eb0cd8810fdac18c2386","versionType":"git"},{"version":"74357d0b5cd3ef544752bc9f21cbeee4902fae6c","status":"affected","versionType":"git"},{"version":"273eec23467dfbfbd0e4c10302579ba441fb1e13","status":"affected","versionType":"git"},{"version":"0df7f4b5cc10f5adf98be0845372e9eef7bb5b09","status":"affected","versionType":"git"},{"version":"5.10.231","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.174","status":"affected","lessThan":"5.15.209","versionType":"semver"},{"version":"6.1.120","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.64","status":"affected","lessThan":"6.6.136","versionType":"semver"},{"version":"6.12.2","status":"affected","lessThan":"6.12.83","versionType":"semver"},{"version":"4.19.325","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.287","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.11.11","status":"affected","lessThan":"6.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/6fire/chip.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","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/6fire/chip.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e719232f4552e29de8027a83918ea94434be87af"},{"url":"https://git.kernel.org/stable/c/e247a0e01d15ed420f77ec5e2335721bf430a5b3"},{"url":"https://git.kernel.org/stable/c/ba88461f7653636c48321ca993006a74724c2f41"},{"url":"https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e"},{"url":"https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0"},{"url":"https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5c"},{"url":"https://git.kernel.org/stable/c/3dc20d1981d6a67d8184498a5da272942dde1e65"},{"url":"https://git.kernel.org/stable/c/51f6532790b74ffdd6970bc848358a2838c1c185"},{"url":"https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:42:07.970Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.231","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.174","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_ker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