{"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": "2025-12-20T08:51:19.897Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-20T08:51:19.897Z"}, "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"}}}}

{}

{"cveTags": [], "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"}], "id": "CVE-2023-53783", "lastModified": "2025-12-09T18:37:13.640", "metrics": {}, "published": "2025-12-09T01:16:49.547", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3538ade9d8c2ba41088e395de916f2599fadba8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e291810fe83a384700eb24a1f714966391ed562"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/984af1e66b4126cf145153661cc24c213e2ec231"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9e8bf9f95f7a299fa9ea45b678d001806ad5e12c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b96d7b4a9745fbd0c8384608ceb1f50415e862fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bf8eb1fd6110871e6232e8e7efe399276ef7e6f6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: blk-iocost: fix divide by 0 error in calc_lcoefs()", "id": "2420233", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420233"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblk-iocost: fix divide by 0 error in calc_lcoefs()\necho max of u64 to cost.model can cause divide by 0 error.\n# echo 8:0 rbps=18446744073709551615 > /sys/fs/cgroup/io.cost.model\ndivide error: 0000 [#1] PREEMPT SMP\nRIP: 0010:calc_lcoefs+0x4c/0xc0\nCall Trace:\n<TASK>\nioc_refresh_params+0x2b3/0x4f0\nioc_cost_model_write+0x3cb/0x4c0\n? _copy_from_iter+0x6d/0x6c0\n? kernfs_fop_write_iter+0xfc/0x270\ncgroup_file_write+0xa0/0x200\nkernfs_fop_write_iter+0x17d/0x270\nvfs_write+0x414/0x620\nksys_write+0x73/0x160\n__x64_sys_write+0x1e/0x30\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\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.\nFix the problem by setting basecost"], "name": "CVE-2023-53783", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53783\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53783\nhttps://lore.kernel.org/linux-cve-announce/2025120939-CVE-2023-53783-4c33@gregkh/T"], "threat_severity": "Moderate"}

{}