{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-54039",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-24T10:53:46.181Z",
        "datePublished": "2025-12-24T10:56:05.365Z",
        "dateUpdated": "2026-05-11T19:54:14.838Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:54:14.838Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: j1939_tp_tx_dat_new(): fix out-of-bounds memory access\n\nIn the j1939_tp_tx_dat_new() function, an out-of-bounds memory access\ncould occur during the memcpy() operation if the size of skb->cb is\nlarger than the size of struct j1939_sk_buff_cb. This is because the\nmemcpy() operation uses the size of skb->cb, leading to a read beyond\nthe struct j1939_sk_buff_cb.\n\nUpdated the memcpy() operation to use the size of struct\nj1939_sk_buff_cb instead of the size of skb->cb. This ensures that the\nmemcpy() operation only reads the memory within the bounds of struct\nj1939_sk_buff_cb, preventing out-of-bounds memory access.\n\nAdditionally, add a BUILD_BUG_ON() to check that the size of skb->cb\nis greater than or equal to the size of struct j1939_sk_buff_cb. This\nensures that the skb->cb buffer is large enough to hold the\nj1939_sk_buff_cb structure.\n\n[mkl: rephrase commit message]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/can/j1939/transport.c"
                    ],
                    "versions": [
                        {
                            "version": "9d71dd0c70099914fcd063135da3c580865e924c",
                            "lessThan": "d2136f05690c272dfc9f9d6efcc51d5f53494b33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c70099914fcd063135da3c580865e924c",
                            "lessThan": "70caa596d158a5d84b117f722d58f3ea503a5ba9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c70099914fcd063135da3c580865e924c",
                            "lessThan": "4fe1d9b6231a68ffc91318f57fd8e4982f028cf7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c70099914fcd063135da3c580865e924c",
                            "lessThan": "4c3fb22a6ec68258ee129a2e6b720f43dffc562f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c70099914fcd063135da3c580865e924c",
                            "lessThan": "36befc9aed6202b4a9b906529aea13eacd7e34ff",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c70099914fcd063135da3c580865e924c",
                            "lessThan": "b45193cb4df556fe6251b285a5ce44046dd36b4a",
                            "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/can/j1939/transport.c"
                    ],
                    "versions": [
                        {
                            "version": "5.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.241",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.178",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.107",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.24",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.11",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3",
                            "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": "5.4",
                                    "versionEndExcluding": "5.4.241"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "5.10.178"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "5.15.107"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.1.24"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.2.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d2136f05690c272dfc9f9d6efcc51d5f53494b33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/70caa596d158a5d84b117f722d58f3ea503a5ba9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4fe1d9b6231a68ffc91318f57fd8e4982f028cf7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4c3fb22a6ec68258ee129a2e6b720f43dffc562f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/36befc9aed6202b4a9b906529aea13eacd7e34ff"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b45193cb4df556fe6251b285a5ce44046dd36b4a"
                }
            ],
            "title": "can: j1939: j1939_tp_tx_dat_new(): fix out-of-bounds memory access",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}