CVE-2026-63820

kernel: f2fs: fix missing read bio submission on large folio error

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · July 19, 2026

Updated · July 21, 2026

Description

A flaw was found in the Linux kernel's f2fs (Flash-Friendly File System) component. This vulnerability occurs when the f2fs_read_data_large_folio() function fails to submit a read block I/O (bio) request if an error is encountered on a subsequent memory page (folio). This can cause earlier folios to remain locked indefinitely, leading to a denial of service (DoS) where affected readers are unable to proceed.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-833 · Deadlock