{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64336",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.781Z",
        "datePublished": "2026-07-25T08:50:01.444Z",
        "dateUpdated": "2026-08-23T12:45:41.365Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-23T12:45:41.365Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: keyspan_pda: fix information leak\n\nThe write() callback is supposed to return the number of characters\naccepted or a negative errno. Since the addition of write fifo support\nthe keyspan_pda implementation will however return the number characters\nsubmitted to the device if the write urb is not already in use. If this\nnumber is larger than the number of characters passed to write(), the\nline discipline continues writing data from beyond the tty write buffer.\n\nFix the information leak by making sure that keyspan_pda_write_start()\nreturns zero on success as intended."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/serial/keyspan_pda.c"
                    ],
                    "versions": [
                        {
                            "version": "02407bc7d42347da7ed2a3926a0b824bfc614914",
                            "lessThan": "cccef1711efbcdbe999738ac27d37b9ef6271abd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "034e38e8f68767fb5438ae3e608ee82919674177",
                            "lessThan": "b069b7029862fafaff331d4c664d97d4ae828d6d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "034e38e8f68767fb5438ae3e608ee82919674177",
                            "lessThan": "e52ca411f50539ff1d0c877b9312771ca8a858c1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "034e38e8f68767fb5438ae3e608ee82919674177",
                            "lessThan": "2f7a6b8ab3845bd1da02604f1a874b52a4555a72",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "034e38e8f68767fb5438ae3e608ee82919674177",
                            "lessThan": "e1494191a3aac665d3a2fce16169a97c346253ec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "034e38e8f68767fb5438ae3e608ee82919674177",
                            "lessThan": "cf6ca0aefae03958cfb5b189b0adbfb25c06bfac",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "034e38e8f68767fb5438ae3e608ee82919674177",
                            "lessThan": "d4b12b6b395e43a2b1d80be3745631fcaa9c047b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "034e38e8f68767fb5438ae3e608ee82919674177",
                            "lessThan": "6bfc8d01ac4068eced509f8fc74d0cd205e4dcec",
                            "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/keyspan_pda.c"
                    ],
                    "versions": [
                        {
                            "version": "5.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.212",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.96",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.39",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.4",
                            "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": "5.11",
                                    "versionEndExcluding": "5.15.212"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.11",
                                    "versionEndExcluding": "6.1.178"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.11",
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                                },
                                {
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                                    "versionStartIncluding": "5.11",
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                                },
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/cccef1711efbcdbe999738ac27d37b9ef6271abd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b069b7029862fafaff331d4c664d97d4ae828d6d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e52ca411f50539ff1d0c877b9312771ca8a858c1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2f7a6b8ab3845bd1da02604f1a874b52a4555a72"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e1494191a3aac665d3a2fce16169a97c346253ec"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cf6ca0aefae03958cfb5b189b0adbfb25c06bfac"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d4b12b6b395e43a2b1d80be3745631fcaa9c047b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6bfc8d01ac4068eced509f8fc74d0cd205e4dcec"
                }
            ],
            "title": "USB: serial: keyspan_pda: fix information leak",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}