{"id":"CVE-2026-31447","summary":"ext4: reject mount if bigalloc with s_first_data_block != 0","details":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: reject mount if bigalloc with s_first_data_block != 0\n\nbigalloc with s_first_data_block != 0 is not supported, reject mounting\nit.","modified":"2026-07-08T07:53:26.715813223Z","published":"2026-04-22T13:53:43.467Z","related":["SUSE-SU-2026:2450-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31447.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ad1f6d608f33f59d21a3d025615d6786a6443998"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b77de3fceafbb39f30e4ff5dc986f863d5456417"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d787d3ae96648dc14a3b7ca8fde817177e82c1c7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31447.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31447"},{"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":"281b59959707dfae03ce038cdf231bf4904e170c"},{"fixed":"5ad6d994255e27a3254079dfb50ca861fc31f2d0"},{"fixed":"3a926957cc95899ef88529710836edadc03c71a1"},{"fixed":"7b58c110b4e1f028eb38eec9ed3555e9be81c8b0"},{"fixed":"b77de3fceafbb39f30e4ff5dc986f863d5456417"},{"fixed":"d787d3ae96648dc14a3b7ca8fde817177e82c1c7"},{"fixed":"ad1f6d608f33f59d21a3d025615d6786a6443998"},{"fixed":"7d5b04290156c3fc316eecc86a4f9d201ab7d44a"},{"fixed":"3822743dc20386d9897e999dbb990befa3a5b3f8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31447.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.0"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.168"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.131"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.80"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.21"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31447.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}