{"cve":"CVE-2026-31447","nvd":{"published":"2026-04-22T14:16:38.577","modified":"2026-10-19T19:17:53.893","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-20"],"references":["https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8","https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1","https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0","https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0","https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-31447","score":0.00143,"percentile":0.0357,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}