{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53783",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-08T23:58:35.272Z",
        "datePublished": "2025-12-09T00:00:38.679Z",
        "dateUpdated": "2026-05-11T19:51:26.633Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:51:26.633Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-iocost: fix divide by 0 error in calc_lcoefs()\n\necho max of u64 to cost.model can cause divide by 0 error.\n\n  # echo 8:0 rbps=18446744073709551615 > /sys/fs/cgroup/io.cost.model\n\n  divide error: 0000 [#1] PREEMPT SMP\n  RIP: 0010:calc_lcoefs+0x4c/0xc0\n  Call Trace:\n   <TASK>\n   ioc_refresh_params+0x2b3/0x4f0\n   ioc_cost_model_write+0x3cb/0x4c0\n   ? _copy_from_iter+0x6d/0x6c0\n   ? kernfs_fop_write_iter+0xfc/0x270\n   cgroup_file_write+0xa0/0x200\n   kernfs_fop_write_iter+0x17d/0x270\n   vfs_write+0x414/0x620\n   ksys_write+0x73/0x160\n   __x64_sys_write+0x1e/0x30\n   do_syscall_64+0x35/0x80\n   entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\ncalc_lcoefs() uses the input value of cost.model in DIV_ROUND_UP_ULL,\noverflow would happen if bps plus IOC_PAGE_SIZE is greater than\nULLONG_MAX, it can cause divide by 0 error.\n\nFix the problem by setting basecost"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-iocost.c"
                    ],
                    "versions": [
                        {
                            "version": "7caa47151ab2e644dd221f741ec7578d9532c9a3",
                            "lessThan": "9e8bf9f95f7a299fa9ea45b678d001806ad5e12c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7caa47151ab2e644dd221f741ec7578d9532c9a3",
                            "lessThan": "6e291810fe83a384700eb24a1f714966391ed562",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7caa47151ab2e644dd221f741ec7578d9532c9a3",
                            "lessThan": "3538ade9d8c2ba41088e395de916f2599fadba8f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7caa47151ab2e644dd221f741ec7578d9532c9a3",
                            "lessThan": "bf8eb1fd6110871e6232e8e7efe399276ef7e6f6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7caa47151ab2e644dd221f741ec7578d9532c9a3",
                            "lessThan": "b96d7b4a9745fbd0c8384608ceb1f50415e862fa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7caa47151ab2e644dd221f741ec7578d9532c9a3",
                            "lessThan": "984af1e66b4126cf145153661cc24c213e2ec231",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-iocost.c"
                    ],
                    "versions": [
                        {
                            "version": "5.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.235",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.173",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.99",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.16",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.3",
                            "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": "5.4.235"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "5.10.173"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "5.15.99"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.1.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.2.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9e8bf9f95f7a299fa9ea45b678d001806ad5e12c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6e291810fe83a384700eb24a1f714966391ed562"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3538ade9d8c2ba41088e395de916f2599fadba8f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bf8eb1fd6110871e6232e8e7efe399276ef7e6f6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b96d7b4a9745fbd0c8384608ceb1f50415e862fa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/984af1e66b4126cf145153661cc24c213e2ec231"
                }
            ],
            "title": "blk-iocost: fix divide by 0 error in calc_lcoefs()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}