{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80862",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.798Z",
        "datePublished": "2026-09-04T15:55:16.653Z",
        "dateUpdated": "2026-10-21T12:47:08.178Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:47:08.178Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix usage of page_frag_cache\n\nnvme uses page_frag_cache to preallocate PDU for each preallocated request\nof block device. Block devices are created in parallel threads,\nconsequently page_frag_cache is used in not thread-safe manner.\nThat leads to incorrect refcounting of backstore pages and premature free.\n\nThat can be catched by !sendpage_ok inside network stack:\n\nWARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310.\n\ttcp_sendmsg_locked+0x782/0xce0\n\ttcp_sendmsg+0x27/0x40\n\tsock_sendmsg+0x8b/0xa0\n\tnvme_tcp_try_send_cmd_pdu+0x149/0x2a0\nThen random panic may occur.\n\nFix that by serializing the usage of page_frag_cache."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nvme/host/tcp.c"
                    ],
                    "versions": [
                        {
                            "version": "4e893ca8117022de68ce1b61c0309e3d17bb8a25",
                            "lessThan": "d19f98c79f1b7e09e4cdf5c20d626e571e487467",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e893ca8117022de68ce1b61c0309e3d17bb8a25",
                            "lessThan": "64561afb42d8390695bf810d9bbd087cbca00291",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e893ca8117022de68ce1b61c0309e3d17bb8a25",
                            "lessThan": "0a9750263ffacbbd2048a391fd4bd22e2146c57d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e893ca8117022de68ce1b61c0309e3d17bb8a25",
                            "lessThan": "6e4cf281558709b92ec2ca3054fe2ffc69266ef9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e893ca8117022de68ce1b61c0309e3d17bb8a25",
                            "lessThan": "36ac05f7cfd59d90c597071304b14e98090d5dd1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c57506918b078ecab7dedebef0f34dbc23ae2e46",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.6.160",
                            "lessThan": "6.7",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nvme/host/tcp.c"
                    ],
                    "versions": [
                        {
                            "version": "6.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.12",
                            "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": "6.12",
                                    "versionEndExcluding": "6.12.108"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "6.18.49"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "7.1.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "7.2.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.160"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d19f98c79f1b7e09e4cdf5c20d626e571e487467"
                },
                {
                    "url": "https://git.kernel.org/stable/c/64561afb42d8390695bf810d9bbd087cbca00291"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0a9750263ffacbbd2048a391fd4bd22e2146c57d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6e4cf281558709b92ec2ca3054fe2ffc69266ef9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/36ac05f7cfd59d90c597071304b14e98090d5dd1"
                }
            ],
            "title": "nvme-tcp: fix usage of page_frag_cache",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}