{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63956",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T07:54:57.023Z",
        "datePublished": "2026-07-19T14:55:47.597Z",
        "dateUpdated": "2026-07-19T14:55:47.597Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-19T14:55:47.597Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: cypress_m8: fix memory corruption with small endpoint\n\nMake sure that the interrupt-out endpoint max packet size is at least\neight bytes to avoid user-controlled slab corruption or NULL-pointer\ndereference should a malicious device report a smaller size."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/serial/cypress_m8.c"
                    ],
                    "versions": [
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "4fcb22218f0a7229b7ce3b3952fb644def293fa5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "ad3d1628a46134276546d7a12fedf04be9979158",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "52e18ae0c47c5c89e18fcd8022f287f7cc8802ec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "4bcaa59f403dbde6328604a500d65ee8d40975d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "1ef25704bd3b625fd151c09feee459479f71ee64",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "284105c40fc31fff90cdab8a0377aaeb92f87f0e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "6c13f3bb652bc8665e709ba07122612586aea648",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "e1a9d791fd66ab2431b9e6f6f835823809869047",
                            "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/serial/cypress_m8.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.26",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.26",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.93",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.35",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.12",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "2.6.26",
                                    "versionEndExcluding": "5.10.259"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "5.15.210"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.1.176"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.6.143"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.12.93"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.18.35"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "7.0.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ad3d1628a46134276546d7a12fedf04be9979158"
                },
                {
                    "url": "https://git.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ec"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1ef25704bd3b625fd151c09feee459479f71ee64"
                },
                {
                    "url": "https://git.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047"
                }
            ],
            "title": "USB: serial: cypress_m8: fix memory corruption with small endpoint",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}