CVE-2026-46004

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This would lead to a UAF for the\nfurther calls like snd_usb_caiaq_control_init(), as Berk suggested in\nanother patch in the link below.\n\nHowever, the problem is not only that; in general, this function drops\nthe all error handlings (as it's a void function) although its caller\ncan propagate an error to snd_probe(), which eventually calls\nsnd_card_free() as a proper error path. That said, we should treat\neach error case in setup_card(), and just return the error code\npromptly, which is then handled later as a fatal error in snd_probe().\n\nThis patch achieves it by changing the setup_card() to return an error\ncode. Also, the superfluous snd_card_free() call is removed, too.\n\nNote that card->private_free can be set still safely at returning an\nerror. All called functions in card_free() have checks of the\nunassigned resources or NULL checks."}], "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": "8e3cd08ed8e590952aa9a656758cb24d4ba898f8", "lessThan": "da938aa9fc7826901921dcea225948ab21a97e45", "status": "affected", "versionType": "git"}, {"version": "8e3cd08ed8e590952aa9a656758cb24d4ba898f8", "lessThan": "09616e25f502080ba684fc7fcf959d1376ab756d", "status": "affected", "versionType": "git"}, {"version": "8e3cd08ed8e590952aa9a656758cb24d4ba898f8", "lessThan": "b956e48371f2ff72b76be9a829800ecec963bd45", "status": "affected", "versionType": "git"}, {"version": "8e3cd08ed8e590952aa9a656758cb24d4ba898f8", "lessThan": "f537e3ad69609f6924a4db6b4a7f6561f5288bdd", "status": "affected", "versionType": "git"}, {"version": "8e3cd08ed8e590952aa9a656758cb24d4ba898f8", 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This would lead to a UAF for the\nfurther calls like snd_usb_caiaq_control_init(), as Berk suggested in\nanother patch in the link below.\n\nHowever, the problem is not only that; in general, this function drops\nthe all error handlings (as it's a void function) although its caller\ncan propagate an error to snd_probe(), which eventually calls\nsnd_card_free() as a proper error path. That said, we should treat\neach error case in setup_card(), and just return the error code\npromptly, which is then handled later as a fatal error in snd_probe().\n\nThis patch achieves it by changing the setup_card() to return an error\ncode. Also, the superfluous snd_card_free() call is removed, too.\n\nNote that card->private_free can be set still safely at returning an\nerror. All called functions in card_free() have checks of the\nunassigned resources or NULL checks."}], "id": "CVE-2026-46004", "lastModified": "2026-11-06T17:17:29.920", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46004", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:04:49.755474Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:18.120", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/09616e25f502080ba684fc7fcf959d1376ab756d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/096dd8519cf2f768e9e14f224b627f7aaee1a9c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/28abd224db4a49560b452115bca3672a20e45b2f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6251e3e256337a30160ef59ab1580dde4d1acd28"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b956e48371f2ff72b76be9a829800ecec963bd45"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da938aa9fc7826901921dcea225948ab21a97e45"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f537e3ad69609f6924a4db6b4a7f6561f5288bdd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ALSA: caiaq: Handle probe errors properly", "id": "2482082", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482082"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel, specifically within the ALSA caiaq driver. This vulnerability arises from improper error handling during the `setup_card()` probe procedure. When an error occurs, the system may attempt to use memory that has already been freed, leading to a Use-After-Free (UAF) condition. This could allow a local attacker to potentially cause a system crash (Denial of Service) or execute arbitrary code."], "name": "CVE-2026-46004", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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-2026-46004\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46004\nhttps://lore.kernel.org/linux-cve-announce/2026052742-CVE-2026-46004-7e24@gregkh/T"], "threat_severity": "Moderate"}

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