{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98728",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.366Z",
        "datePublished": "2026-10-18T15:47:05.722Z",
        "dateUpdated": "2026-10-19T09:24:38.853Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:24:38.853Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: fix off-by-four bounds check in tpm2_get_random()\n\nWhen the response carries the TPM2_ST_SESSIONS tag, tpm2_get_random()\nskips the 4-byte parameter size field before locating the random data,\nbut the bounds check still validates the response length against\nTPM_HEADER_SIZE.  A truncated response can pass the check and make\nmemcpy() read up to 4 bytes past the response end, so stale buffer\ncontents end up in the caller's random bytes.\n\nFix this by checking the response length against 'offset', which\nalready includes the skipped parameter size field."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/char/tpm/tpm2-cmd.c"
                    ],
                    "versions": [
                        {
                            "version": "1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497",
                            "lessThan": "be54101992c2c5218be0e0a87827ccc96e3089af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497",
                            "lessThan": "e30a2406408d2df6d9cd48c2e59e913cf266a05a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497",
                            "lessThan": "42bb6216b861e892512128219ff23010d656ba14",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497",
                            "lessThan": "9b522400bf5c082feb9a0037a053ea822a2c7e4d",
                            "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/char/tpm/tpm2-cmd.c"
                    ],
                    "versions": [
                        {
                            "version": "6.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.56",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.10",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "6.10",
                                    "versionEndExcluding": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10",
                                    "versionEndExcluding": "6.18.56"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10",
                                    "versionEndExcluding": "7.2.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/be54101992c2c5218be0e0a87827ccc96e3089af"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e30a2406408d2df6d9cd48c2e59e913cf266a05a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/42bb6216b861e892512128219ff23010d656ba14"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9b522400bf5c082feb9a0037a053ea822a2c7e4d"
                }
            ],
            "title": "tpm: fix off-by-four bounds check in tpm2_get_random()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}