Linux Kernel up to 6.19.2 f2fs_enable_checkpoint deadlock

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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.19.2. Impacted is the function f2fs_enable_checkpoint. This manipulation causes deadlock. This vulnerability is tracked as CVE-2026-23232. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.19.2 and classified as critical. Affected by this vulnerability is the function f2fs_enable_checkpoint. The manipulation with an unknown input leads to a deadlock vulnerability. The CWE definition for the vulnerability is CWE-833. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: block cache/dio write during f2fs_enable_checkpoint()" This reverts commit 196c81fdd438f7ac429d5639090a9816abb9760a. Original patch may cause below deadlock, revert it. write remount - write_begin - lock_page --- lock A - prepare_write_begin - f2fs_map_lock - f2fs_enable_checkpoint - down_write(cp_enable_rwsem) --- lock B - sync_inode_sb - writepages - lock_page --- lock A - down_read(cp_enable_rwsem) --- lock A

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-23232 since 01/13/2026. The exploitation appears to be difficult. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 301144 (Linux Distros Unpatched Vulnerability : CVE-2026-23232), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.19.3 or 7.0-rc1 eliminates this vulnerability. Applying the patch b6382273801bc7c778545dd8004c9a9d750b4f62/3996b70209f145bfcf2afc7d05dd92c27b233b48 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (301144) and CERT Bund (WID-SEC-2026-0614). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Microsoft Azure Linux
  • Open Source Linux Kernel
  • IBM QRadar SIEM

Productinfo

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Version

License

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deadlock
CWE: CWE-833 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 301144
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23232

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.19.3/7.0-rc1
Patch: b6382273801bc7c778545dd8004c9a9d750b4f62/3996b70209f145bfcf2afc7d05dd92c27b233b48

Timelineinfo

01/13/2026 CVE reserved
03/04/2026 +50 days Advisory disclosed
03/04/2026 +0 days VulDB entry created
06/24/2026 +112 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23232 (🔒)
GCVE (CVE): GCVE-0-2026-23232
GCVE (VulDB): GCVE-100-348727
CERT Bund: WID-SEC-2026-0614 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 03/04/2026 16:05
Updated: 06/24/2026 07:50
Changes: 03/04/2026 16:05 (58), 03/05/2026 13:23 (7), 03/07/2026 17:12 (2), 03/18/2026 06:43 (12), 04/20/2026 11:35 (1), 04/29/2026 22:59 (1), 06/24/2026 07:50 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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