In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() In… (CVE-2026-53303)
In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data. Fix this by holding sb_lock around the entire extension list read and format operation.
AI Analysis
Technical Summary
The vulnerability CVE-2026-53303 involves a lack of proper locking (sb_lock) when reading the extension_list in the f2fs_sbi_show() function within the f2fs filesystem implementation. This could potentially lead to inconsistent or unsafe access to internal data structures. The affected version is exactly 3.0 of the Microsoft product. No further technical details or exploitation methods are provided.
Potential Impact
The impact is not explicitly detailed in the provided information. The lack of proper locking could lead to data inconsistency or potential information disclosure, but no confirmed exploitation or impact scenarios are described. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() In… (CVE-2026-53303)
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data. Fix this by holding sb_lock around the entire extension list read and format operation.
CVSS v3.1
Score 7.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-53303 involves a lack of proper locking (sb_lock) when reading the extension_list in the f2fs_sbi_show() function within the f2fs filesystem implementation. This could potentially lead to inconsistent or unsafe access to internal data structures. The affected version is exactly 3.0 of the Microsoft product. No further technical details or exploitation methods are provided.
Potential Impact
The impact is not explicitly detailed in the provided information. The lack of proper locking could lead to data inconsistency or potential information disclosure, but no confirmed exploitation or impact scenarios are described. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-53303
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- 3.1
Threat ID: 6a483cbc27e9c79719d833f9
Added to database: 07/03/2026, 22:50:36 UTC
Last enriched: 07/03/2026, 23:06:57 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 15
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