{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-50015",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "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."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "776722e85d3b",
                                            "version_value": "f8a7c342326f"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "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"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
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                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/f8a7c342326f6ad1dfdb30a18dd013c70f5e9669",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/f8a7c342326f6ad1dfdb30a18dd013c70f5e9669"
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                "url": "https://git.kernel.org/stable/c/8c30a9a8610c314554997f86370140746aa35661",
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                "url": "https://git.kernel.org/stable/c/abfaa876b948baaea4d14f21a1963789845c8b4c",
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                "name": "https://git.kernel.org/stable/c/abfaa876b948baaea4d14f21a1963789845c8b4c"
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                "name": "https://git.kernel.org/stable/c/5efccdee4a7d507a483f20f880b809cc4eaef14d"
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                "name": "https://git.kernel.org/stable/c/a9f331f51515bdb3ebc8d0963131af367ef468f6"
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