{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74500",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.907Z",
        "datePublished": "2026-08-15T12:27:26.359Z",
        "dateUpdated": "2026-08-17T05:20:38.636Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:20:38.636Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix stack info leak in RME Digiface status\n\nsnd_rme_digiface_read_status() reads a four-word status block from the\ndevice into an uninitialised on-stack __le32 buf[4] and, whenever the\nvendor control-IN transfer does not return a negative error, copies all\nfour words into the caller's status[].\n\nsnd_usb_ctl_msg() copies the full requested size back into the caller's\nbuffer regardless of how many bytes the data stage actually delivered:\n\n\tbuf = kmemdup(data, size, GFP_KERNEL);\n\terr = usb_control_msg(dev, pipe, request, requesttype,\n\t\t\t      value, index, buf, size, timeout);\n\tmemcpy(data, buf, size);\n\nusb_control_msg() returns the transferred length on a short control-IN,\nwhich is a non-negative value, and writes only that many bytes.  The\nremainder of the copy back is the kmemdup()ed image of the caller's\nbuffer, so a device answering with a short data stage leaves the\ntrailing words of buf[] holding leftover kernel stack.  The only guard\nin the caller is err < 0, so those words are stored into status[].\n\nThey then reach user space: snd_rme_digiface_get_status_val() selects a\n16-bit halfword of status[] per the control's reg/mask, and the eight\nDigiface status controls together expose the whole 16-byte frame to an\nunprivileged reader of /dev/snd/controlC*.\n\nZero-initialise the buffer so a short read yields zeros instead of stack\nresidue.  This mirrors snd_rme_get_status1(), which already clears its\noutput word before the same kind of vendor read.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/usb/mixer_quirks.c"
                    ],
                    "versions": [
                        {
                            "version": "611a96f6acf2e74fe28cb90908a9c183862348ce",
                            "lessThan": "b3a346d5c99dd73cf84711f2a43e42691990efd2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "611a96f6acf2e74fe28cb90908a9c183862348ce",
                            "lessThan": "7ba01e0d3539d9cf0aef3e82938f1648147744cc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "611a96f6acf2e74fe28cb90908a9c183862348ce",
                            "lessThan": "98dbfbb38e297c25c5b0af4a9018d71ac25e8554",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "611a96f6acf2e74fe28cb90908a9c183862348ce",
                            "lessThan": "441aaad150c57edaf57ee482a79a3bf4c5b7e353",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3089703ab71484a8b9a7641051181d11d60f870c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "50f63f11a6ddaa0d34574df72b3fa6ee257c057d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.10.14",
                            "lessThan": "6.11",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.11.3",
                            "lessThan": "6.12",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/usb/mixer_quirks.c"
                    ],
                    "versions": [
                        {
                            "version": "6.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.103",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.44",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.8",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "6.12.103"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "6.18.44"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "7.1.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "7.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b3a346d5c99dd73cf84711f2a43e42691990efd2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7ba01e0d3539d9cf0aef3e82938f1648147744cc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/98dbfbb38e297c25c5b0af4a9018d71ac25e8554"
                },
                {
                    "url": "https://git.kernel.org/stable/c/441aaad150c57edaf57ee482a79a3bf4c5b7e353"
                }
            ],
            "title": "ALSA: usb-audio: fix stack info leak in RME Digiface status",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}