{"id":"CVE-2025-37863","state":"PUBLISHED","title":"ovl: don't allow datadir only","description":"In the Linux kernel, the following vulnerability has been resolved:\n\novl: don't allow datadir only\n\nIn theory overlayfs could support upper layer directly referring to a data\nlayer, but there's no current use case for this.\n\nOriginally, when data-only layers were introduced, this wasn't allowed,\nonly introduced by the \"datadir+\" feature, but without actually handling\nthis case, resulting in an Oops.\n\nFix by disallowing datadir without lowerdir.","publishedAt":"2025-05-09T06:43:54.250Z","updatedAt":"2026-05-23T15:58:27.343Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cc0918b3582c98f12cfb30bf7496496d14bff3e9","status":"affected","lessThan":"0874b629f65320778e7e3e206177770666d9db18","versionType":"git"},{"version":"24e16e385f2272b1a9df51337a5c32d28a29c7ad","status":"affected","lessThan":"b9e3579213ba648fa23f780e8d53e99011c62331","versionType":"git"},{"version":"24e16e385f2272b1a9df51337a5c32d28a29c7ad","status":"affected","lessThan":"21d2ffb0e9838a175064c22f3a9de97d1f56f27d","versionType":"git"},{"version":"24e16e385f2272b1a9df51337a5c32d28a29c7ad","status":"affected","lessThan":"eb3a04a8516ee9b5174379306f94279fc90424c4","versionType":"git"},{"version":"6.6.23","status":"affected","lessThan":"6.6.88","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/overlayfs/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.6.88","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.25","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.4","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/overlayfs/super.c"]}],"references":["https://git.kernel.org/stable/c/0874b629f65320778e7e3e206177770666d9db18","https://git.kernel.org/stable/c/b9e3579213ba648fa23f780e8d53e99011c62331","https://git.kernel.org/stable/c/21d2ffb0e9838a175064c22f3a9de97d1f56f27d","https://git.kernel.org/stable/c/eb3a04a8516ee9b5174379306f94279fc90424c4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:03.054Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/37xxx/CVE-2025-37863.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-37863","state":"PUBLISHED","datePublished":"2025-05-09T06:43:54.250Z","dateUpdated":"2026-05-23T15:58:27.343Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:23.958Z"},"containers":{"cna":{"title":"ovl: don't allow datadir only","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\novl: don't allow datadir only\n\nIn theory overlayfs could support upper layer directly referring to a data\nlayer, but there's no current use case for this.\n\nOriginally, when data-only layers were introduced, this wasn't allowed,\nonly introduced by the \"datadir+\" feature, but without actually handling\nthis case, resulting in an Oops.\n\nFix by disallowing datadir without lowerdir."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cc0918b3582c98f12cfb30bf7496496d14bff3e9","status":"affected","lessThan":"0874b629f65320778e7e3e206177770666d9db18","versionType":"git"},{"version":"24e16e385f2272b1a9df51337a5c32d28a29c7ad","status":"affected","lessThan":"b9e3579213ba648fa23f780e8d53e99011c62331","versionType":"git"},{"version":"24e16e385f2272b1a9df51337a5c32d28a29c7ad","status":"affected","lessThan":"21d2ffb0e9838a175064c22f3a9de97d1f56f27d","versionType":"git"},{"version":"24e16e385f2272b1a9df51337a5c32d28a29c7ad","status":"affected","lessThan":"eb3a04a8516ee9b5174379306f94279fc90424c4","versionType":"git"},{"version":"6.6.23","status":"affected","lessThan":"6.6.88","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/overlayfs/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.6.88","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.25","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.4","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/overlayfs/super.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0874b629f65320778e7e3e206177770666d9db18"},{"url":"https://git.kernel.org/stable/c/b9e3579213ba648fa23f780e8d53e99011c62331"},{"url":"https://git.kernel.org/stable/c/21d2ffb0e9838a175064c22f3a9de97d1f56f27d"},{"url":"https://git.kernel.org/stable/c/eb3a04a8516ee9b5174379306f94279fc90424c4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:58:27.343Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.23","versionEndExcluding":"6.6.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.14.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}