{"id":"CVE-2026-53015","state":"PUBLISHED","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","publishedAt":"2026-06-24T16:29:25.396Z","updatedAt":"2026-10-30T12:26:27.980Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"d142250132454bf86cba87018fb2d29c482dacd6","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"4fc9b12e43a3f19a01a8fb61f7961be79de20253","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"858e4d98a86adf34584767388deb6c9b217f70c5","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"582b0bf201157632cb5474c885989a6ebda46521","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"2d8c7edcb661812249469f4a5b62e9339118846f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/zmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/zmap.c"]}],"references":["https://git.kernel.org/stable/c/d142250132454bf86cba87018fb2d29c482dacd6","https://git.kernel.org/stable/c/18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c","https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253","https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5","https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521","https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f"],"weaknesses":[],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53015.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53015","state":"PUBLISHED","datePublished":"2026-06-24T16:29:25.396Z","dateUpdated":"2026-10-30T12:26:27.980Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.378Z"},"containers":{"cna":{"title":"erofs: unify lcn as u64 for 32-bit platforms","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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"d142250132454bf86cba87018fb2d29c482dacd6","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"4fc9b12e43a3f19a01a8fb61f7961be79de20253","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"858e4d98a86adf34584767388deb6c9b217f70c5","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"582b0bf201157632cb5474c885989a6ebda46521","versionType":"git"},{"version":"152a333a589560bee002e4c96761f1b560a5793c","status":"affected","lessThan":"2d8c7edcb661812249469f4a5b62e9339118846f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/zmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/zmap.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d142250132454bf86cba87018fb2d29c482dacd6"},{"url":"https://git.kernel.org/stable/c/18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:27.980Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}