CVE-2026-46048

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46048", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.094Z", "datePublished": "2026-05-27T12:57:04.477Z", "dateUpdated": "2026-06-14T17:50:34.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-14T17:50:34.000Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: caiaq: fix usb_dev refcount leak on probe failure\n\ncreate_card() takes a reference on the USB device with usb_get_dev()\nand stores the matching usb_put_dev() in card_free(), which is\ninstalled as the snd_card's ->private_free destructor.\n\nHowever, ->private_free is only assigned near the end of init_card(),\nafter several failure points (usb_set_interface(), EP type checks,\nusb_submit_urb(), the EP1_CMD_GET_DEVICE_INFO exchange, and its\ntimeout). When any of those fail, init_card() returns an error to\nsnd_probe(), which calls snd_card_free(card). Because ->private_free\nis still NULL, card_free() never runs, the usb_get_dev() reference\nis not dropped, and the struct usb_device leaks along with its\ndescriptor allocations and device_private.\n\nsyzbot reproduces this with a malformed UAC3 device whose only valid\naltsetting is 0; init_card()'s usb_set_interface(usb_dev, 0, 1) call\nfails with -EIO and triggers the leak.\n\nMove the ->private_free assignment into create_card(), immediately\nafter usb_get_dev(), so that every error path reaching snd_card_free()\nbalances the reference. card_free()'s callees (snd_usb_caiaq_input_free,\nfree_urbs, kfree) already tolerate the partially-initialized state\nbecause the chip private area is zero-initialized by snd_card_new()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/usb/caiaq/device.c"], "versions": [{"version": "493b3a682ededc804555755f5d2193201339612d", "lessThan": "c874db8a1d2f9f08161470d00cfe8db2f5cca2cc", "status": "affected", "versionType": "git"}, {"version": "dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e", "lessThan": "6fa8dff64fb6c401ced40a05797b327659317498", "status": "affected", "versionType": "git"}, {"version": "ac7345f68cda6989016d85d63f7b244c064aa8f6", "lessThan": "a8d907acc3e5a078c2e5637ff60c30c6d2ddc23a", "status": "affected", "versionType": "git"}, {"version": "f6634af5de728a46792f674a66d7843570cb68f7", "lessThan": "50c6a1f05973f56d23280c9d7645a7a5734e0907", "status": "affected", "versionType": "git"}, {"version": "1d9be95aee6c6246a21752e60c9519902649f482", "lessThan": "da3b8fd6a202d94fef11a443abc9171c52426a1c", "status": "affected", "versionType": "git"}, {"version": "6473ed16df1fe88051140611b3eb9a49be7f429e", "lessThan": "6153878c5255bb69b7d0868105ca078ef13cbcf8", "status": "affected", "versionType": "git"}, {"version": "59b622a043cffc58b7638cd85ae6c30a0904f8e6", "lessThan": "21ca595aafa40d3ac70eab1f4cb62cc00ca21657", "status": "affected", "versionType": "git"}, {"version": "80bb50e2d459213cccff3111d5ef98ed4238c0d5", "lessThan": "7a5f1cd22d47f8ca4b760b6334378ae42c1bd24b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/usb/caiaq/device.c"], "versions": [{"version": "6.6.136", "lessThan": "6.6.140", "status": "affected", "versionType": "semver"}, {"version": "6.12.84", "lessThan": "6.12.86", "status": "affected", "versionType": "semver"}, {"version": "6.18.25", "lessThan": "6.18.27", "status": "affected", "versionType": "semver"}, {"version": "7.0.2", "lessThan": "7.0.4", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.136", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.84", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.25", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.2", "versionEndExcluding": "7.0.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c874db8a1d2f9f08161470d00cfe8db2f5cca2cc"}, {"url": "https://git.kernel.org/stable/c/6fa8dff64fb6c401ced40a05797b327659317498"}, {"url": "https://git.kernel.org/stable/c/a8d907acc3e5a078c2e5637ff60c30c6d2ddc23a"}, {"url": "https://git.kernel.org/stable/c/50c6a1f05973f56d23280c9d7645a7a5734e0907"}, {"url": "https://git.kernel.org/stable/c/da3b8fd6a202d94fef11a443abc9171c52426a1c"}, {"url": "https://git.kernel.org/stable/c/6153878c5255bb69b7d0868105ca078ef13cbcf8"}, {"url": "https://git.kernel.org/stable/c/21ca595aafa40d3ac70eab1f4cb62cc00ca21657"}, {"url": "https://git.kernel.org/stable/c/7a5f1cd22d47f8ca4b760b6334378ae42c1bd24b"}], "title": "ALSA: caiaq: fix usb_dev refcount leak on probe failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/usb/caiaq/device.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c874db8a1d2f9f08161470d00cfe8db2f5cca2cc", "status": "affected", "version": "493b3a682ededc804555755f5d2193201339612d", "versionType": "git"}, {"lessThan": "6fa8dff64fb6c401ced40a05797b327659317498", "status": "affected", "version": "dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e", "versionType": "git"}, {"lessThan": "a8d907acc3e5a078c2e5637ff60c30c6d2ddc23a", "status": "affected", "version": "ac7345f68cda6989016d85d63f7b244c064aa8f6", "versionType": "git"}, {"lessThan": "50c6a1f05973f56d23280c9d7645a7a5734e0907", "status": "affected", "version": "f6634af5de728a46792f674a66d7843570cb68f7", "versionType": "git"}, {"lessThan": "da3b8fd6a202d94fef11a443abc9171c52426a1c", "status": "affected", "version": "1d9be95aee6c6246a21752e60c9519902649f482", "versionType": "git"}, {"lessThan": "6153878c5255bb69b7d0868105ca078ef13cbcf8", "status": "affected", "version": "6473ed16df1fe88051140611b3eb9a49be7f429e", "versionType": "git"}, {"lessThan": "21ca595aafa40d3ac70eab1f4cb62cc00ca21657", "status": "affected", "version": "59b622a043cffc58b7638cd85ae6c30a0904f8e6", "versionType": "git"}, {"lessThan": "7a5f1cd22d47f8ca4b760b6334378ae42c1bd24b", "status": "affected", "version": "80bb50e2d459213cccff3111d5ef98ed4238c0d5", "versionType": "git"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/usb/caiaq/device.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6.6.140", "status": "affected", "version": "6.6.136", "versionType": "semver"}, {"lessThan": "6.12.86", "status": "affected", "version": "6.12.84", "versionType": "semver"}, {"lessThan": "6.18.27", "status": "affected", "version": "6.18.25", "versionType": "semver"}, {"lessThan": "7.0.4", "status": "affected", "version": "7.0.2", "versionType": "semver"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0FA1B944-78D8-45D7-A8B0-0B41685B6E78", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.6.136", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "68464024-93DF-45F6-A661-D6D7CB575D06", "versionEndExcluding": "6.12.86", "versionStartIncluding": "6.12.84", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C56DF34F-56C3-4E5D-9497-241EAA95B3EC", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.18.25", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "78E1B212-E5FF-4F46-B84D-FD98FCE5162B", "versionEndExcluding": "7.0.4", "versionStartIncluding": "7.0.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: caiaq: fix usb_dev refcount leak on probe failure\n\ncreate_card() takes a reference on the USB device with usb_get_dev()\nand stores the matching usb_put_dev() in card_free(), which is\ninstalled as the snd_card's ->private_free destructor.\n\nHowever, ->private_free is only assigned near the end of init_card(),\nafter several failure points (usb_set_interface(), EP type checks,\nusb_submit_urb(), the EP1_CMD_GET_DEVICE_INFO exchange, and its\ntimeout). When any of those fail, init_card() returns an error to\nsnd_probe(), which calls snd_card_free(card). Because ->private_free\nis still NULL, card_free() never runs, the usb_get_dev() reference\nis not dropped, and the struct usb_device leaks along with its\ndescriptor allocations and device_private.\n\nsyzbot reproduces this with a malformed UAC3 device whose only valid\naltsetting is 0; init_card()'s usb_set_interface(usb_dev, 0, 1) call\nfails with -EIO and triggers the leak.\n\nMove the ->private_free assignment into create_card(), immediately\nafter usb_get_dev(), so that every error path reaching snd_card_free()\nbalances the reference. card_free()'s callees (snd_usb_caiaq_input_free,\nfree_urbs, kfree) already tolerate the partially-initialized state\nbecause the chip private area is zero-initialized by snd_card_new()."}], "id": "CVE-2026-46048", "lastModified": "2026-06-17T10:52:57.833", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-27T14:17:24.310", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/21ca595aafa40d3ac70eab1f4cb62cc00ca21657"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/50c6a1f05973f56d23280c9d7645a7a5734e0907"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6153878c5255bb69b7d0868105ca078ef13cbcf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6fa8dff64fb6c401ced40a05797b327659317498"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a5f1cd22d47f8ca4b760b6334378ae42c1bd24b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a8d907acc3e5a078c2e5637ff60c30c6d2ddc23a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c874db8a1d2f9f08161470d00cfe8db2f5cca2cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da3b8fd6a202d94fef11a443abc9171c52426a1c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ALSA: caiaq: fix usb_dev refcount leak on probe failure", "id": "2482119", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482119"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's ALSA caiaq driver. This vulnerability, a reference count leak, occurs when the `create_card()` function acquires a reference to a USB device, but the corresponding release is not performed if `init_card()` fails before the destructor is properly assigned. A local attacker with a malformed Universal Audio Class 3 (UAC3) device could exploit this to cause a resource leak, potentially leading to a denial of service due to system resource exhaustion."], "name": "CVE-2026-46048", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46048\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46048\nhttps://lore.kernel.org/linux-cve-announce/2026052753-CVE-2026-46048-f25e@gregkh/T"], "threat_severity": "Low"}

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