{"cve":"CVE-2026-63820","nvd":{"published":"2026-07-19T12:16:55.103","modified":"2026-08-17T05:17:19.437","status":"Awaiting Analysis","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix missing read bio submission on large folio error\n\nf2fs_read_data_large_folio() can keep a read bio across multiple\nreadahead folios.  If a later folio hits an error before any of its\nblocks are added to the bio, folio_in_bio is false and the current error\npath returns immediately after ending that folio.\n\nThis can leave the bio accumulated for earlier folios unsubmitted.  Those\nfolios then never receive read completion, and readers can wait\nindefinitely on the locked folios.\n\nRoute errors through the common out path so any pending bio is submitted\nbefore returning.  Stop consuming more readahead folios once an error is\nseen, and only wait on and clear the current folio when it was actually\nadded to the bio.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/48c92559e7b66fdc3cbc74f6e152e66ec0150a0a","https://git.kernel.org/stable/c/74c8d2ec95c59a5651ecd975c466998af1961fd4"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-63820","score":0.00198,"percentile":0.09576,"date":"2026-10-31"},"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."]}