{"api_version":"1","generated_at":"2026-06-25T03:17:20+00:00","cve":"CVE-2026-53015","urls":{"html":"https://cve.report/CVE-2026-53015","api":"https://cve.report/api/cve/CVE-2026-53015.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53015","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53015"},"summary":{"title":"erofs: unify lcn as u64 for 32-bit platforms","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: unify lcn as u64 for 32-bit platforms\n\nAs sashiko reported [1], `lcn` was typed as `unsigned long` (or\n`unsigned int` sometimes), which is only 32 bits wide on 32-bit\nplatforms, which causes `(lcn << lclusterbits)` to be truncated\nat 4 GiB.\n\nIn order to consolidate the logic, just use `u64` consistently\naround the codebase.\n\n[1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:12","updated_at":"2026-06-24 17:17:12"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521","name":"https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253","name":"https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f","name":"https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5","name":"https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53015","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53015","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 152a333a589560bee002e4c96761f1b560a5793c 4fc9b12e43a3f19a01a8fb61f7961be79de20253 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 152a333a589560bee002e4c96761f1b560a5793c 858e4d98a86adf34584767388deb6c9b217f70c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 152a333a589560bee002e4c96761f1b560a5793c 582b0bf201157632cb5474c885989a6ebda46521 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 152a333a589560bee002e4c96761f1b560a5793c 2d8c7edcb661812249469f4a5b62e9339118846f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.91 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.33 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.10 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/erofs/zmap.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4fc9b12e43a3f19a01a8fb61f7961be79de20253","status":"affected","version":"152a333a589560bee002e4c96761f1b560a5793c","versionType":"git"},{"lessThan":"858e4d98a86adf34584767388deb6c9b217f70c5","status":"affected","version":"152a333a589560bee002e4c96761f1b560a5793c","versionType":"git"},{"lessThan":"582b0bf201157632cb5474c885989a6ebda46521","status":"affected","version":"152a333a589560bee002e4c96761f1b560a5793c","versionType":"git"},{"lessThan":"2d8c7edcb661812249469f4a5b62e9339118846f","status":"affected","version":"152a333a589560bee002e4c96761f1b560a5793c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/erofs/zmap.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.91","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.33","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.10","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: unify lcn as u64 for 32-bit platforms\n\nAs sashiko reported [1], `lcn` was typed as `unsigned long` (or\n`unsigned int` sometimes), which is only 32 bits wide on 32-bit\nplatforms, which causes `(lcn << lclusterbits)` to be truncated\nat 4 GiB.\n\nIn order to consolidate the logic, just use `u64` consistently\naround the codebase.\n\n[1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com"}],"providerMetadata":{"dateUpdated":"2026-06-24T16:29:25.396Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253"},{"url":"https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5"},{"url":"https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521"},{"url":"https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f"}],"title":"erofs: unify lcn as u64 for 32-bit platforms","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53015","datePublished":"2026-06-24T16:29:25.396Z","dateReserved":"2026-06-09T07:44:35.378Z","dateUpdated":"2026-06-24T16:29:25.396Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 17:17:12","lastModifiedDate":"2026-06-24 17:17:12","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53015","Ordinal":"1","Title":"erofs: unify lcn as u64 for 32-bit platforms","CVE":"CVE-2026-53015","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53015","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: unify lcn as u64 for 32-bit platforms\n\nAs sashiko reported [1], `lcn` was typed as `unsigned long` (or\n`unsigned int` sometimes), which is only 32 bits wide on 32-bit\nplatforms, which causes `(lcn << lclusterbits)` to be truncated\nat 4 GiB.\n\nIn order to consolidate the logic, just use `u64` consistently\naround the codebase.\n\n[1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com","Type":"Description","Title":"erofs: unify lcn as u64 for 32-bit platforms"}]}}}