CVE-2026-63820

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the f2fs file system where the f2fs read data large folio() function can maintain a read bio across multiple readahead folios. If a subsequent folio encounters an error before its blocks are added to the bio, the system may return immediately, leaving the accumulated bio for previous folios unsubmitted. Consequently, those folios never receive read completion, which can cause readers to wait indefinitely on locked folios.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.