cvelist/2022/49xxx/CVE-2022-49464.json

{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2022-49464",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix buffer copy overflow of ztailpacking feature\n\nI got some KASAN report as below:\n\n[   46.959738] ==================================================================\n[   46.960430] BUG: KASAN: use-after-free in z_erofs_shifted_transform+0x2bd/0x370\n[   46.960430] Read of size 4074 at addr ffff8880300c2f8e by task fssum/188\n...\n[   46.960430] Call Trace:\n[   46.960430]  <TASK>\n[   46.960430]  dump_stack_lvl+0x41/0x5e\n[   46.960430]  print_report.cold+0xb2/0x6b7\n[   46.960430]  ? z_erofs_shifted_transform+0x2bd/0x370\n[   46.960430]  kasan_report+0x8a/0x140\n[   46.960430]  ? z_erofs_shifted_transform+0x2bd/0x370\n[   46.960430]  kasan_check_range+0x14d/0x1d0\n[   46.960430]  memcpy+0x20/0x60\n[   46.960430]  z_erofs_shifted_transform+0x2bd/0x370\n[   46.960430]  z_erofs_decompress_pcluster+0xaae/0x1080\n\nThe root cause is that the tail pcluster won't be a complete filesystem\nblock anymore. So if ztailpacking is used, the second part of an\nuncompressed tail pcluster may not be ``rq->pageofs_out``."
            }
        ]
    },
    "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": "ab749badf9f41f32509cd103391b81ea7e684b76",
                                            "version_value": "4d53a625f29074e7b8236c2c0e0922edb7608df9"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.17",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.17",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.17.14",
                                                        "lessThanOrEqual": "5.17.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.18.3",
                                                        "lessThanOrEqual": "5.18.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.19",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/4d53a625f29074e7b8236c2c0e0922edb7608df9",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/4d53a625f29074e7b8236c2c0e0922edb7608df9"
            },
            {
                "url": "https://git.kernel.org/stable/c/6b59e1907f58cf877c563dcf013159eb9f994b64",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/6b59e1907f58cf877c563dcf013159eb9f994b64"
            },
            {
                "url": "https://git.kernel.org/stable/c/dcbe6803fffd387f72b48c2373b5f5ed12a5804b",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/dcbe6803fffd387f72b48c2373b5f5ed12a5804b"
            }
        ]
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    "generator": {
        "engine": "bippy-5f407fcff5a0"
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}