{"cve":"CVE-2026-90259","nvd":{"published":"2026-09-17T17:17:22.330","modified":"2026-10-21T13:20:44.893","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: qgroup: fix a wrong length calculation in qgroup_free_reserved_data()\n\nIn that function, we round down the start position and round up the\nending position.\n\nBut during the calculation of @len, we use \"round_up(start + len,\nsectorsize)\", which is the rounded up end position, not the rounded up\nlength.\n\nWhich results a much larger length, and later we are still using\n\"start + len\", which is completely incorrect.\n\nFix it by declaring a local @aligned_start and @aligned_len and use them\ninstead.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/202ac9e469b78817512921c5db05cc2140e4ca43","https://git.kernel.org/stable/c/34adc843c28e5cd1f533a1d64f51b0f756fdf945","https://git.kernel.org/stable/c/9102b179512e11644fb0489ae62010a09afa199c","https://git.kernel.org/stable/c/c4c136555ff90f1e2921cc42da43daac0ef9985e","https://git.kernel.org/stable/c/e6edde29990af8064b9d12217ec03db231ccd55d"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-90259","score":0.00206,"percentile":0.10561,"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."]}