Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-53303

Severity CVSS v4.0:
Pending analysis
Type:
CWE-125 Out-of-bounds Read
Publication date:
26/06/2026
Last modified:
06/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()<br /> <br /> In f2fs_sbi_show(), the extension_list, extension_count and<br /> hot_ext_count are read without holding sbi-&gt;sb_lock. If a concurrent<br /> sysfs store modifies the extension list via f2fs_update_extension_list(),<br /> the show path may read inconsistent count and array contents, potentially<br /> leading to out-of-bounds access or displaying stale data.<br /> <br /> Fix this by holding sb_lock around the entire extension list read<br /> and format operation.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x
7.10
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.17 (including) 6.1.175 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.141 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.91 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.33 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.10 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools