{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63902",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T07:54:57.019Z",
        "datePublished": "2026-07-19T14:55:10.267Z",
        "dateUpdated": "2026-07-19T14:55:10.267Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-19T14:55:10.267Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: cypress_m8: validate interrupt packet headers\n\ncypress_read_int_callback() parses the interrupt-in buffer according to\nthe selected Cypress packet format. Format 1 has a two-byte status/count\nheader and format 2 has a one-byte combined status/count header. The\nusb-serial core sizes the interrupt-in buffer from the endpoint\ndescriptor's wMaxPacketSize, and successful interrupt transfers can\ncomplete short when URB_SHORT_NOT_OK is not set.\n\nCheck that the completed packet contains the selected header before\nreading it. Malformed short reports are ignored and the interrupt URB is\nresubmitted through the existing retry path, preventing out-of-bounds\nheader-byte reads.\n\nKASAN report as below:\nKASAN slab-out-of-bounds in cypress_read_int_callback+0x240/0x7f0\nRead of size 1\nCall trace:\n  cypress_read_int_callback() (drivers/usb/serial/cypress_m8.c:1009)\n  __usb_hcd_giveback_urb()\n  dummy_timer()\n\n[ johan: use constants in header length sanity checks ]"
                }
            ],
            "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": "fcef31a5a85ccf3c313449a866ec6ed7e4132425",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "aaa66708bfb1dca2acd219d1c1582f9f6d5492cb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "be50533fe7068e86eb7adb81988e6d6a3f6dfe53",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "90664556916de22467097d4c8ceb716d597a5c32",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "ae03453f2c809ca3cf73753269fa6184dea7160f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "4a4cb0021ebe1fcadb52e04d19ed8d71470a530b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
                            "lessThan": "9f9bfc80c67f35a275820da7e83a35dface08281",
                            "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"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.6.143"
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                                {
                                    "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",
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                                },
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                                    "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/fcef31a5a85ccf3c313449a866ec6ed7e4132425"
                },
                {
                    "url": "https://git.kernel.org/stable/c/aaa66708bfb1dca2acd219d1c1582f9f6d5492cb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/be50533fe7068e86eb7adb81988e6d6a3f6dfe53"
                },
                {
                    "url": "https://git.kernel.org/stable/c/90664556916de22467097d4c8ceb716d597a5c32"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ae03453f2c809ca3cf73753269fa6184dea7160f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4a4cb0021ebe1fcadb52e04d19ed8d71470a530b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9f9bfc80c67f35a275820da7e83a35dface08281"
                }
            ],
            "title": "USB: serial: cypress_m8: validate interrupt packet headers",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}