{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31412",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.087Z",
        "datePublished": "2026-04-10T10:35:05.796Z",
        "dateUpdated": "2026-05-11T22:08:12.685Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:08:12.685Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_mass_storage: Fix potential integer overflow in check_command_size_in_blocks()\n\nThe `check_command_size_in_blocks()` function calculates the data size\nin bytes by left shifting `common->data_size_from_cmnd` by the block\nsize (`common->curlun->blkbits`). However, it does not validate whether\nthis shift operation will cause an integer overflow.\n\nInitially, the block size is set up in `fsg_lun_open()` , and the\n`common->data_size_from_cmnd` is set up in `do_scsi_command()`. During\ninitialization, there is no integer overflow check for the interaction\nbetween two variables.\n\nSo if a malicious USB host sends a SCSI READ or WRITE command\nrequesting a large amount of data (`common->data_size_from_cmnd`), the\nleft shift operation can wrap around. This results in a truncated data\nsize, which can bypass boundary checks and potentially lead to memory\ncorruption or out-of-bounds accesses.\n\nFix this by using the check_shl_overflow() macro to safely perform the\nshift and catch any overflows."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/gadget/function/f_mass_storage.c"
                    ],
                    "versions": [
                        {
                            "version": "144974e7f9e32b53b02f6c8632be45d8f43d6ab5",
                            "lessThan": "91817ad5452defe69bc7bc0e355f0ed5d01125cc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "144974e7f9e32b53b02f6c8632be45d8f43d6ab5",
                            "lessThan": "ce0caaed5940162780c5c223b8ae54968a5f059b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "144974e7f9e32b53b02f6c8632be45d8f43d6ab5",
                            "lessThan": "228b37936376143f4b60cc6828663f6eaceb81b5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "144974e7f9e32b53b02f6c8632be45d8f43d6ab5",
                            "lessThan": "3428dc5520c811e66622b2f5fa43341bf9a1f8b3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "144974e7f9e32b53b02f6c8632be45d8f43d6ab5",
                            "lessThan": "387ebb0453b99d71491419a5dc4ab4bee0cacbac",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "144974e7f9e32b53b02f6c8632be45d8f43d6ab5",
                            "lessThan": "8479891d1f04a8ce55366fe4ca361ccdb96f02e1",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/gadget/function/f_mass_storage.c"
                    ],
                    "versions": [
                        {
                            "version": "3.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.3",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.78",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.19",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.9",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "3.3",
                                    "versionEndExcluding": "6.1.167"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.3",
                                    "versionEndExcluding": "6.6.130"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.3",
                                    "versionEndExcluding": "6.12.78"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.3",
                                    "versionEndExcluding": "6.18.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.3",
                                    "versionEndExcluding": "6.19.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.3",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/91817ad5452defe69bc7bc0e355f0ed5d01125cc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ce0caaed5940162780c5c223b8ae54968a5f059b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/228b37936376143f4b60cc6828663f6eaceb81b5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3428dc5520c811e66622b2f5fa43341bf9a1f8b3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/387ebb0453b99d71491419a5dc4ab4bee0cacbac"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8479891d1f04a8ce55366fe4ca361ccdb96f02e1"
                }
            ],
            "title": "usb: gadget: f_mass_storage: Fix potential integer overflow in check_command_size_in_blocks()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}