{"id":"CVE-2026-31447","revision":"9550459ff0de4469b321305926c2b7fd","records":[{"revision":"9550459ff0de4469b321305926c2b7fd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31447","aliases":[],"title":"ext4: reject mount if bigalloc with s_first_data_block != 0","description":"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.","state":0,"publishedAt":"2026-04-22T13:53:43.467+00:00","modifiedAt":"2026-10-19T18:35:48.523+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ext4/super.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"5ad6d994255e27a3254079dfb50ca861fc31f2d0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"3a926957cc95899ef88529710836edadc03c71a1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"7b58c110b4e1f028eb38eec9ed3555e9be81c8b0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"b77de3fceafbb39f30e4ff5dc986f863d5456417\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"d787d3ae96648dc14a3b7ca8fde817177e82c1c7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"ad1f6d608f33f59d21a3d025615d6786a6443998\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"7d5b04290156c3fc316eecc86a4f9d201ab7d44a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"281b59959707dfae03ce038cdf231bf4904e170c\",\n                            \"lessThan\": \"3822743dc20386d9897e999dbb990befa3a5b3f8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ext4/super.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.253\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.203\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.168\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.131\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.80\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.21\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.11\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0","https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1","https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0","https://git.kernel.org/stable/c/b77de3fceafbb39f30e4ff5dc986f863d5456417","https://git.kernel.org/stable/c/d787d3ae96648dc14a3b7ca8fde817177e82c1c7","https://git.kernel.org/stable/c/ad1f6d608f33f59d21a3d025615d6786a6443998","https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a","https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31447","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31447","identifiers":["CVE-2026-31447"]},"retained":false,"historicalAffected":[]}],"coverage":[]}