CVE-2026-63820

linux: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix missing read bio submission on large f...

CVE-2026-63820 is fixed in linux on 1 platform by DEBIAN-CVE-2026-63820 (version 7.1.3-1), released July 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
n/a
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0020
9th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
linux · Debian 14 7.1.3-1 DEBIAN-CVE-2026-63820 Jul 20, 2026

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