{"id":"CVE-2025-37863","summary":"ovl: don't allow datadir only","details":"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.","modified":"2026-04-02T12:47:34.792915Z","published":"2025-05-09T06:43:54.250Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37863.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0874b629f65320778e7e3e206177770666d9db18"},{"type":"WEB","url":"https://git.kernel.org/stable/c/21d2ffb0e9838a175064c22f3a9de97d1f56f27d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9e3579213ba648fa23f780e8d53e99011c62331"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb3a04a8516ee9b5174379306f94279fc90424c4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37863.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-37863"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cc0918b3582c98f12cfb30bf7496496d14bff3e9"},{"fixed":"0874b629f65320778e7e3e206177770666d9db18"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"24e16e385f2272b1a9df51337a5c32d28a29c7ad"},{"fixed":"b9e3579213ba648fa23f780e8d53e99011c62331"},{"fixed":"21d2ffb0e9838a175064c22f3a9de97d1f56f27d"},{"fixed":"eb3a04a8516ee9b5174379306f94279fc90424c4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37863.json"}}],"schema_version":"1.7.5"}