{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80846",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.797Z",
        "datePublished": "2026-09-04T15:54:56.492Z",
        "dateUpdated": "2026-10-19T08:44:40.508Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:44:40.508Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: drop ESP-in-TCP packets with no ingress device\n\nESP-in-TCP receives records through the TCP strparser. handle_esp()\nrestores skb->dev from the saved skb_iif before passing the packet into\nthe XFRM input path.\n\nQueued TCP data can be processed after the original ingress device has\nbeen removed, for example during veth or net namespace teardown. In that\ncase dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input\npaths both expect skb->dev to be valid while building the route lookup,\nso queued ESP-in-TCP data can dereference a NULL device.\n\nDrop the packet if the saved ingress device can no longer be resolved.\nSuch a packet can no longer be routed through the normal XFRM receive\npath, and this preserves the existing behaviour for packets whose ingress\ndevice still exists."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/xfrm/espintcp.c"
                    ],
                    "versions": [
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "239d0f71af09dc2029fd4d730cb24b8c83aaa43a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "f00235f9d12301183d61f75fbe4105506f3e5140",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "6af5cdb03819a5ce6e945992635c6c5e91045367",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "2dd1609cadff46c4b20ce53b91ab9cce1380456a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "c296d25efbc840be24de83f56d43bc47e714ace9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "328e40aa774b446969c69b654c52a051a95af8a1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "7911e0236616487b89db6bd3ba3f408abd10eb23",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "943d95233b8b4a88994e244fcf466f8c403d63f1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e27cca96cd68fa2c6814c90f9a1cfd36bb68c593",
                            "lessThan": "e1d7c5ac1c246ce5775f604515de0a59fbf2116e",
                            "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/xfrm/espintcp.c"
                    ],
                    "versions": [
                        {
                            "version": "5.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.269",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.220",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.187",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.156",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.108",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.49",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.13",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.3",
                            "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": "5.6",
                                    "versionEndExcluding": "5.10.269"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "5.15.220"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.1.187"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.6.156"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.12.108"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.18.49"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.1.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.2.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/239d0f71af09dc2029fd4d730cb24b8c83aaa43a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f00235f9d12301183d61f75fbe4105506f3e5140"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6af5cdb03819a5ce6e945992635c6c5e91045367"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2dd1609cadff46c4b20ce53b91ab9cce1380456a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c296d25efbc840be24de83f56d43bc47e714ace9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/328e40aa774b446969c69b654c52a051a95af8a1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7911e0236616487b89db6bd3ba3f408abd10eb23"
                },
                {
                    "url": "https://git.kernel.org/stable/c/943d95233b8b4a88994e244fcf466f8c403d63f1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e1d7c5ac1c246ce5775f604515de0a59fbf2116e"
                }
            ],
            "title": "xfrm: drop ESP-in-TCP packets with no ingress device",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}