Linux Kernel up to 6.4.6 blk_mq_elv_switch_none 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 has been found in Linux Kernel up to 6.4.6 and classified as critical. This issue affects the function blk_mq_elv_switch_none. The manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2023-53292. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.4.6 and classified as critical. This issue affects the function blk_mq_elv_switch_none. 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: blk-mq: fix NULL dereference on q->elevator in blk_mq_elv_switch_none After grabbing q->sysfs_lock, q->elevator may become NULL because of elevator switch. Fix the NULL dereference on q->elevator by checking it with lock.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2023-53292 since 09/16/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 265194 (Linux Distros Unpatched Vulnerability : CVE-2023-53292), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.4.7 eliminates this vulnerability. Applying the patch 3e977386521b71471e66ec2ba82efdfcc456adf2/245165658e1c9f95c0fecfe02b9b1ebd30a1198a 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 (265194) and CERT Bund (WID-SEC-2025-2053). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • IBM QRadar SIEM
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Dell Secure Connect Gateway
  • F5 F5OS

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 5.5
NVD Vector: 🔒

ADP CISA Base Score: 5.5
ADP CISA Vector: 🔒

CVSSv2info

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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: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 265194
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53292

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.4.7
Patch: 3e977386521b71471e66ec2ba82efdfcc456adf2/245165658e1c9f95c0fecfe02b9b1ebd30a1198a

Timelineinfo

09/16/2025 Advisory disclosed
09/16/2025 +0 days CVE reserved
09/16/2025 +0 days VulDB entry created
06/02/2026 +259 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53292 (🔒)
GCVE (CVE): GCVE-0-2023-53292
GCVE (VulDB): GCVE-100-324383
CERT Bund: WID-SEC-2025-2053 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 09/16/2025 14:06
Updated: 06/02/2026 08:47
Changes: 09/16/2025 14:06 (58), 09/20/2025 02:05 (2), 12/03/2025 04:12 (10), 01/02/2026 12:32 (7), 01/11/2026 11:20 (1), 06/02/2026 08:47 (9)
Complete: 🔍
Cache ID: 216::103

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

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