CVE-2026-63820

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/48c92559e7b66fdc3cbc74f6e152e66ec0150a0a	Patch
https://git.kernel.org/stable/c/74c8d2ec95c59a5651ecd975c466998af1961fd4	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

10 Nov 2026, 17:25

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/48c92559e7b66fdc3cbc74f6e152e66ec0150a0a -~~	() https://git.kernel.org/stable/c/48c92559e7b66fdc3cbc74f6e152e66ec0150a0a - Patch
References	~~() https://git.kernel.org/stable/c/74c8d2ec95c59a5651ecd975c466998af1961fd4 -~~	() https://git.kernel.org/stable/c/74c8d2ec95c59a5651ecd975c466998af1961fd4 - Patch
First Time		Linux linux Kernel Linux
CPE		cpe:2.3:o:linux:linux_kernel::::::::
CWE		CWE-404
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5

Information

Published : 2026-07-19 12:16

Updated : 2026-11-10 17:25

NVD link : CVE-2026-63820

Mitre link : CVE-2026-63820

CVE.ORG link : CVE-2026-63820

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-404

Improper Resource Shutdown or Release

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