{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-68294",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-16T14:48:05.293Z",
        "datePublished": "2025-12-16T15:06:14.177Z",
        "dateUpdated": "2026-08-05T12:10:41.250Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:10:41.250Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/net: ensure vectored buffer node import is tied to notification\n\nWhen support for vectored registered buffers was added, the import\nitself is using 'req' rather than the notification io_kiocb, sr->notif.\nFor non-vectored imports, sr->notif is correctly used. This is important\nas the lifetime of the two may be different. Use the correct io_kiocb\nfor the vectored buffer import."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - Exploitation requires a local process to submit an IORING_OP_SENDMSG_ZC operation through io_uring; incoming network traffic alone cannot reach the vulnerable import path.\nAC:L - The attacker controls buffer registration, the vectored send, notification lifetime, and buffer unregistration or replacement. A corked, congested, or deliberately stalled socket can reliably keep the notification outstanding after the main request completes.\nPR:L - An ordinary unprivileged user can create an io_uring instance, register their own memory, and use TCP or UDP sockets without capabilities when io_uring is enabled under its default policy.\nUI:N - No action by another user is required after the attacker submits the operations and manipulates the registered-buffer lifetime.\nS:U - Any resulting kernel compromise is a conventional local privilege escalation within the host kernel's security authority, not a mandatory cross-scope escape.\nC:H - The premature unpin permits network transmission to continue reading pages after they have been freed or recycled, potentially disclosing arbitrary kernel or other-process memory to an attacker-controlled peer.\nI:H - The stale managed fragments can cause page-reference and allocator corruption when subsequently referenced or downgraded, providing a use-after-free-class primitive that can plausibly be developed into arbitrary memory modification or kernel code execution.\nA:H - Accessing or changing references on prematurely released pages can trigger kernel faults, allocator corruption, oopses, or a system panic."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/net.c"
                    ],
                    "versions": [
                        {
                            "version": "23371eac7d9a9bca5360cfb3eb3aa08648ee7246",
                            "lessThan": "14459281e027f23b70885c1cc1032a71c0efd8d7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "23371eac7d9a9bca5360cfb3eb3aa08648ee7246",
                            "lessThan": "f6041803a831266a2a5a5b5af66f7de0845bcbf3",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/net.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.11",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "6.15",
                                    "versionEndExcluding": "6.17.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/14459281e027f23b70885c1cc1032a71c0efd8d7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f6041803a831266a2a5a5b5af66f7de0845bcbf3"
                }
            ],
            "title": "io_uring/net: ensure vectored buffer node import is tied to notification",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}