{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31518",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.108Z",
        "datePublished": "2026-04-22T13:54:34.191Z",
        "dateUpdated": "2026-10-15T01:16:51.564Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:10:20.804Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nesp: fix skb leak with espintcp and async crypto\n\nWhen the TX queue for espintcp is full, esp_output_tail_tcp will\nreturn an error and not free the skb, because with synchronous crypto,\nthe common xfrm output code will drop the packet for us.\n\nWith async crypto (esp_output_done), we need to drop the skb when\nesp_output_tail_tcp returns an error."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv4/esp4.c",
                        "net/ipv6/esp6.c"
                    ],
                    "versions": [
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "aca3ad0c262f54a5b5c95dda80a48365997d1224",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "41aafca57de4a4c026701622bd4648f112a9edcd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "4820847e036ff1035b01b69ad68dfc17e7028fe9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "6a3ec6efbc4f90e0ccb2e71574f07351f19996f4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "df6f995358dc1f3c42484f5cfe241d7bd3e1cd15",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "88d386243ed374ac969dabd3bbc1409a31d81818",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "6aa9841d917532d0f2d932d1ff2f3a94305aaf47",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv4/esp4.c",
                        "net/ipv6/esp6.c"
                    ],
                    "versions": [
                        {
                            "version": "5.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.168",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.131",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.80",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.21",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.11",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "5.6",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.1.168"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.6.131"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.12.80"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.18.21"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.19.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224"
                },
                {
                    "url": "https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15"
                },
                {
                    "url": "https://git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2"
                }
            ],
            "title": "esp: fix skb leak with espintcp and async crypto",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "x_adpType": "supplier",
                "providerMetadata": {
                    "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
                    "shortName": "siemens-SADP",
                    "dateUpdated": "2026-10-15T01:16:51.564Z"
                },
                "affected": [
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.5",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.7",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.5",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.7",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.5",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.7",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.5",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.7",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.5",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.7",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    }
                ],
                "references": [
                    {
                        "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
                    },
                    {
                        "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
                    },
                    {
                        "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
                    }
                ]
            }
        ]
    }
}