Linux Kernel up to 6.3.1 corrupt_bio_byte 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 classified as critical has been found in Linux Kernel up to 6.3.1. This impacts the function corrupt_bio_byte. This manipulation causes null pointer dereference. This vulnerability is tracked as CVE-2023-53786. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.3.1 and classified as critical. Affected by this vulnerability is the function corrupt_bio_byte. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: dm flakey: fix a crash with invalid table line This command will crash with NULL pointer dereference: dmsetup create flakey --table \ "0 `blockdev --getsize /dev/ram0` flakey /dev/ram0 0 0 1 2 corrupt_bio_byte 512" Fix the crash by checking if arg_name is non-NULL before comparing it.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2023-53786 since 12/09/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 278102 (Linux Distros Unpatched Vulnerability : CVE-2023-53786), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.315, 4.19.283, 5.4.243, 5.10.180, 5.15.111, 6.1.28, 6.2.15 or 6.3.2 eliminates this vulnerability. Applying the patch f95cb1526669ccdf7eb12eefd57a893953e3595f/12849ed107c0b2869fb775c81208050899006f07/337b7af273562b73c46ef77a724604ad139ca762/a1e3fffe02e05c05357af91364ac0fc1ed425b5b/f76fcb9d43ec014ac4a1bb983768696d5b032df9/cb874a190f3f7c3c3fa5b979bee7a3b8cc3a19cc/83b4e3d878ea6be9aec1d5a1ab177c766c64d1a0/8258d84a7917aeece773716518deadb7ad776cb7/98dba02d9a93eec11bffbb93c7c51624290702d2 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 (278102) and CERT Bund (WID-SEC-2025-2765). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky 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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Nessus ID: 278102
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53786

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.315/4.19.283/5.4.243/5.10.180/5.15.111/6.1.28/6.2.15/6.3.2
Patch: f95cb1526669ccdf7eb12eefd57a893953e3595f/12849ed107c0b2869fb775c81208050899006f07/337b7af273562b73c46ef77a724604ad139ca762/a1e3fffe02e05c05357af91364ac0fc1ed425b5b/f76fcb9d43ec014ac4a1bb983768696d5b032df9/cb874a190f3f7c3c3fa5b979bee7a3b8cc3a19cc/83b4e3d878ea6be9aec1d5a1ab177c766c64d1a0/8258d84a7917aeece773716518deadb7ad776cb7/98dba02d9a93eec11bffbb93c7c51624290702d2

Timelineinfo

12/09/2025 Advisory disclosed
12/09/2025 +0 days CVE reserved
12/09/2025 +0 days VulDB entry created
03/29/2026 +110 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53786 (🔒)
GCVE (CVE): GCVE-0-2023-53786
GCVE (VulDB): GCVE-100-335047
CERT Bund: WID-SEC-2025-2765 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/09/2025 11:14
Updated: 03/29/2026 09:49
Changes: 12/09/2025 11:14 (58), 12/11/2025 03:33 (2), 03/29/2026 09:49 (7)
Complete: 🔍
Cache ID: 216:8AB:103

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