Linux Kernel up to 6.4.6 FS null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.4.6. It has been rated as critical. This vulnerability affects unknown code of the component FS. The manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2023-53766. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.4.6 and classified as critical. This issue affects an unknown function of the component FS. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: FS: JFS: Check for read-only mounted filesystem in txBegin This patch adds a check for read-only mounted filesystem in txBegin before starting a transaction potentially saving from NULL pointer deref.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2023-53766 since 12/08/2025. Neither technical details nor an exploit are publicly available.

Upgrading to version 4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.123, 6.1.42 or 6.4.7 eliminates this vulnerability. Applying the patch a88efca805bea93cea9187dfd00835aa7093bf1b/97c1f26e4d4af55e8584e4646dd5c5fa7baf62c7/2a8807f9f511c64de0c7cc9900a1683e3d72a3e5/5c094ca994824e038b6a97835ded4e5d1d808504/2febd5f81e4bfba61d9f374dcca628aff374cc56/aa7cdf487ab3fa47284daaccc3d7d5de01c6a84c/b0ed8ed0428ee96092da6fefa5cfacbe4abed701/95e2b352c03b0a86c5717ba1d24ea20969abcacc 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 EUVD (EUVD-2023-60062) and CERT Bund (WID-SEC-2025-2756). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

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

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.324/4.19.293/5.4.255/5.10.192/5.15.123/6.1.42/6.4.7
Patch: a88efca805bea93cea9187dfd00835aa7093bf1b/97c1f26e4d4af55e8584e4646dd5c5fa7baf62c7/2a8807f9f511c64de0c7cc9900a1683e3d72a3e5/5c094ca994824e038b6a97835ded4e5d1d808504/2febd5f81e4bfba61d9f374dcca628aff374cc56/aa7cdf487ab3fa47284daaccc3d7d5de01c6a84c/b0ed8ed0428ee96092da6fefa5cfacbe4abed701/95e2b352c03b0a86c5717ba1d24ea20969abcacc

Timelineinfo

12/08/2025 Advisory disclosed
12/08/2025 +0 days CVE reserved
12/08/2025 +0 days VulDB entry created
02/23/2026 +77 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53766 (🔒)
GCVE (CVE): GCVE-0-2023-53766
GCVE (VulDB): GCVE-100-334733
EUVD: 🔒
CERT Bund: WID-SEC-2025-2756 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/08/2025 06:29
Updated: 02/23/2026 04:33
Changes: 12/08/2025 06:29 (58), 12/08/2025 08:40 (1), 12/09/2025 06:27 (7), 01/04/2026 12:09 (1), 01/22/2026 07:02 (1), 02/23/2026 04:33 (1)
Complete: 🔍
Cache ID: 216::103

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