{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64381",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.784Z",
        "datePublished": "2026-07-25T08:50:31.209Z",
        "dateUpdated": "2026-08-17T04:54:32.853Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T04:54:32.853Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix next buffer leak in receive_encrypted_standard()\n\nreceive_encrypted_standard() allocates next_buffer before checking\nwhether the number of compound PDUs already reached MAX_COMPOUND. If\nthe limit check fails, the function returns immediately and the newly\nallocated next_buffer is not assigned to server->smallbuf/server->bigbuf,\nmaking it leaked.\n\nMove the MAX_COMPOUND check before allocating next_buffer."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/smb2ops.c"
                    ],
                    "versions": [
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "94e4f672db029414b9888b5137a7559f1febf2d8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "68fc0b6cc03ca58060c0f36454e169f5fe258974",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "07e0ab81df1790afa35732a4e8e07ff831b29008",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "9136a08dc29328edd9867f2545e73906ac9df93b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "67097772df7791c53d608f04bd31c676ccf79b83",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "297243e365fc9fe2f8e9b7dd535a65d922cd108b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "927d4805aea0a287d36dd4f826ee24d69a2afee3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b24df3e30cbf48255db866720fb71f14bf9d2f39",
                            "lessThan": "1c6267a1d5cf4c73b656f8181b310cbbb3e4767b",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/smb2ops.c"
                    ],
                    "versions": [
                        {
                            "version": "4.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.261",
                            "lessThanOrEqual": "5.10.*",
                            "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": "4.19",
                                    "versionEndExcluding": "5.10.261"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "5.15.212"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "6.1.178"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "6.12.96"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
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                                {
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                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "7.1.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "7.2"
                                }
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                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/94e4f672db029414b9888b5137a7559f1febf2d8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/68fc0b6cc03ca58060c0f36454e169f5fe258974"
                },
                {
                    "url": "https://git.kernel.org/stable/c/07e0ab81df1790afa35732a4e8e07ff831b29008"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9136a08dc29328edd9867f2545e73906ac9df93b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/67097772df7791c53d608f04bd31c676ccf79b83"
                },
                {
                    "url": "https://git.kernel.org/stable/c/297243e365fc9fe2f8e9b7dd535a65d922cd108b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/927d4805aea0a287d36dd4f826ee24d69a2afee3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1c6267a1d5cf4c73b656f8181b310cbbb3e4767b"
                }
            ],
            "title": "smb: client: Fix next buffer leak in receive_encrypted_standard()",
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    }
}