{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2024-50015",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-10-21T12:17:06.062Z",
        "datePublished": "2024-10-21T18:54:06.465Z",
        "dateUpdated": "2024-10-22T13:28:48.148Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-10-21T18:54:06.465Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: dax: fix overflowing extents beyond inode size when partially writing\n\nThe dax_iomap_rw() does two things in each iteration: map written blocks\nand copy user data to blocks. If the process is killed by user(See signal\nhandling in dax_iomap_iter()), the copied data will be returned and added\non inode size, which means that the length of written extents may exceed\nthe inode size, then fsck will fail. An example is given as:\n\ndd if=/dev/urandom of=file bs=4M count=1\n dax_iomap_rw\n  iomap_iter // round 1\n   ext4_iomap_begin\n    ext4_iomap_alloc // allocate 0~2M extents(written flag)\n  dax_iomap_iter // copy 2M data\n  iomap_iter // round 2\n   iomap_iter_advance\n    iter->pos += iter->processed // iter->pos = 2M\n   ext4_iomap_begin\n    ext4_iomap_alloc // allocate 2~4M extents(written flag)\n  dax_iomap_iter\n   fatal_signal_pending\n  done = iter->pos - iocb->ki_pos // done = 2M\n ext4_handle_inode_extension\n  ext4_update_inode_size // inode size = 2M\n\nfsck reports: Inode 13, i_size is 2097152, should be 4194304.  Fix?\n\nFix the problem by truncating extents if the written length is smaller\nthan expected."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/file.c"
                    ],
                    "versions": [
                        {
                            "version": "776722e85d3b",
                            "lessThan": "f8a7c342326f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "776722e85d3b",
                            "lessThan": "8c30a9a8610c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "776722e85d3b",
                            "lessThan": "abfaa876b948",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "776722e85d3b",
                            "lessThan": "5efccdee4a7d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "776722e85d3b",
                            "lessThan": "a9f331f51515",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "776722e85d3b",
                            "lessThan": "ec0dd451e236",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "776722e85d3b",
                            "lessThan": "dda898d7ffe8",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/file.c"
                    ],
                    "versions": [
                        {
                            "version": "4.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.10",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.10.227",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.15.168",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.1.113",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.6.55",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.10.14",
                            "lessThanOrEqual": "6.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.11.3",
                            "lessThanOrEqual": "6.11.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.12-rc1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/f8a7c342326f6ad1dfdb30a18dd013c70f5e9669"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8c30a9a8610c314554997f86370140746aa35661"
                },
                {
                    "url": "https://git.kernel.org/stable/c/abfaa876b948baaea4d14f21a1963789845c8b4c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5efccdee4a7d507a483f20f880b809cc4eaef14d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a9f331f51515bdb3ebc8d0963131af367ef468f6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ec0dd451e236c46e4858d53e9e82bae7797a7af5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dda898d7ffe85931f9cca6d702a51f33717c501e"
                }
            ],
            "title": "ext4: dax: fix overflowing extents beyond inode size when partially writing",
            "x_generator": {
                "engine": "bippy-c9c4e1df01b2"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2024-50015",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-10-22T13:28:08.580885Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-10-22T13:28:48.148Z"
                }
            }
        ]
    }
}