CVE-2026-31581

{"id": "CVE-2026-31581", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "f2d06d4e129e2508e356136f99bb20a332ff1a00", "lessThan": "e719232f4552e29de8027a83918ea94434be87af", "versionType": "git"}, {"status": "affected", "version": "b889a7d68d7e76b8795b754a75c91a2d561d5e8c", "lessThan": "e247a0e01d15ed420f77ec5e2335721bf430a5b3", "versionType": "git"}, {"status": "affected", "version": "ea8cc56db659cf0ae57073e32a4735ead7bd7ee3", "lessThan": "ba88461f7653636c48321ca993006a74724c2f41", "versionType": "git"}, {"status": "affected", "version": "b754e831a94f82f2593af806741392903f359168", "lessThan": "e88354b381e2006de63d6b052ed7005c9a47d00e", "versionType": "git"}, {"status": "affected", "version": "57860a80f03f9dc69a34a5c37b0941ad032a0a8c", "lessThan": "af75b486f7e883e3422ece23c8d727e6815144a0", "versionType": "git"}, {"status": "affected", "version": "a0810c3d6dd2d29a9b92604d682eacd2902ce947", "lessThan": "d21e8a2af4869b5890b34e081d5aeadc93e9cd5c", "versionType": "git"}, {"status": "affected", "version": "a0810c3d6dd2d29a9b92604d682eacd2902ce947", "lessThan": "3dc20d1981d6a67d8184498a5da272942dde1e65", "versionType": "git"}, {"status": "affected", "version": "a0810c3d6dd2d29a9b92604d682eacd2902ce947", "lessThan": "51f6532790b74ffdd6970bc848358a2838c1c185", "versionType": "git"}, {"status": "affected", "version": "a0810c3d6dd2d29a9b92604d682eacd2902ce947", "lessThan": "b9c826916fdce6419b94eb0cd8810fdac18c2386", "versionType": "git"}, {"status": "affected", "version": "74357d0b5cd3ef544752bc9f21cbeee4902fae6c", "versionType": "git"}, {"status": "affected", "version": "273eec23467dfbfbd0e4c10302579ba441fb1e13", "versionType": "git"}, {"status": "affected", "version": "0df7f4b5cc10f5adf98be0845372e9eef7bb5b09", "versionType": "git"}, {"status": "affected", "version": "5.10.231", "lessThan": "5.10.258", "versionType": "semver"}, {"status": "affected", "version": "5.15.174", "lessThan": "5.15.209", "versionType": "semver"}, {"status": "affected", "version": "6.1.120", "lessThan": "6.1.175", "versionType": "semver"}, {"status": "affected", "version": "6.6.64", "lessThan": "6.6.136", "versionType": "semver"}, {"status": "affected", "version": "6.12.2", "lessThan": "6.12.83", "versionType": "semver"}, {"status": "affected", "version": "4.19.325", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.4.287", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "6.11.11", "lessThan": "6.12", "versionType": "semver"}], "programFiles": ["sound/usb/6fire/chip.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"status": "unaffected", "version": "0", "lessThan": "6.13", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.136", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.83", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.24", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.14", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0.1", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["sound/usb/6fire/chip.c"], "defaultStatus": "affected"}]}], "published": "2026-04-24T15:16:32.797", "references": [{"url": "https://git.kernel.org/stable/c/3dc20d1981d6a67d8184498a5da272942dde1e65", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/51f6532790b74ffdd6970bc848358a2838c1c185", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ba88461f7653636c48321ca993006a74724c2f41", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e247a0e01d15ed420f77ec5e2335721bf430a5b3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e719232f4552e29de8027a83918ea94434be87af", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nALSA: 6fire: corregir uso despu\u00e9s de liberaci\u00f3n al desconectar\n\nEn usb6fire_chip_abort(), la estructura chip se asigna como datos privados de la tarjeta (a trav\u00e9s de snd_card_new con sizeof(struct sfire_chip)). Cuando se llama a snd_card_free_when_closed() y no hay descriptores de archivo abiertos, la tarjeta y el chip incrustado se liberan sincr\u00f3nicamente. La escritura posterior de chip -> card = NULL entonces accede a memoria slab liberada.\n\nTraza de llamada:\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+0x 1a04/0x 4518 drivers/usb/core/hub.c:5953\n\nSoluci\u00f3n moviendo el ciclo de vida de la tarjeta fuera de usb6fire_chip_abort() y hacia usb6fire_chip_disconnect(). El puntero de la tarjeta se guarda en una variable local antes de cualquier desmantelamiento, se llama primero a snd_card_disconnect() para evitar nuevas aperturas, los URB se abortan mientras el chip sigue siendo v\u00e1lido, y se llama a snd_card_free_when_closed() al final para que el chip nunca sea accedido despu\u00e9s de que la tarjeta pueda ser liberada."}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "14109CEF-714B-4029-A318-97AA58A01833", "versionEndExcluding": "6.6.136"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A8BAD957-8E20-401C-A129-DFF3655CA0B7", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A", "versionEndExcluding": "7.0.1", "versionStartIncluding": "7.0"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}