Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix missing read bio submission on large folio error f2fs_read_data_large_folio() can keep a read bio across multiple readahead folios. If a later folio hits an error before any of its blocks are added to the bio, folio_in_bio is false and the current error path returns immediately after ending that folio. This can leave the bio accumulated for earlier folios unsubmitted. Those folios then never receive read completion, and readers can wait indefinitely on the locked folios. Route errors through the common out path so any pending bio is submitted before returning. Stop consuming more readahead folios once an error is seen, and only wait on and clear the current folio when it was actually added to the bio.
References
- https://git.kernel.org/stable/c/48c92559e7b66fdc3cbc74f6e152e66ec0150a0a
- https://git.kernel.org/stable/c/74c8d2ec95c59a5651ecd975c466998af1961fd4
FAQ
What is CVE-2026-63820?
CVE-2026-63820 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: f2fs: fix missing read bio submission on large folio error f2fs_read_data_large_folio() can keep a read bio across multiple readah...
How severe is CVE-2026-63820?
CVSS scoring is not yet available for CVE-2026-63820. Check NVD for updates.
Is there a patch for CVE-2026-63820?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.