Linux Kernel up to 6.3.1 initialization

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5.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 5.10.179/5.15.110/6.1.27/6.2.14/6.3.1 and classified as critical. The impacted element is an unknown function. Performing a manipulation results in initialization. This vulnerability was named CVE-2023-53474. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.10.179/5.15.110/6.1.27/6.2.14/6.3.1. It has been classified as critical. This affects an unknown part. The manipulation with an unknown input leads to a initialization vulnerability. CWE is classifying the issue as CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD: Use an u64 for bank_map Thee maximum number of MCA banks is 64 (MAX_NR_BANKS), see a0bc32b3cacf ("x86/mce: Increase maximum number of banks to 64"). However, the bank_map which contains a bitfield of which banks to initialize is of type unsigned int and that overflows when those bit numbers are >= 32, leading to UBSAN complaining correctly: UBSAN: shift-out-of-bounds in arch/x86/kernel/cpu/mce/amd.c:1365:38 shift exponent 32 is too large for 32-bit type 'int' Change the bank_map to a u64 and use the proper BIT_ULL() macro when modifying bits in there. [ bp: Rewrite commit message. ]

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-53474 since 10/01/2025. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/20/2026).

The vulnerability scanner Nessus provides a plugin with the ID 269644 (Linux Distros Unpatched Vulnerability : CVE-2023-53474), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.180, 5.15.111, 6.1.28, 6.2.15 or 6.3.2 eliminates this vulnerability. Applying the patch a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83/11c58a0c1937c157dbdf82d5ab634d68c99f3098/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e/67bb7521b6420d81dab7538c0686f18f7d6d09f4/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 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 (269644) and CERT Bund (WID-SEC-2025-2187). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• Open Source Linux Kernel
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.179
• 5.15.110
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.1.22
• 6.1.23
• 6.1.24
• 6.1.25
• 6.1.26
• 6.1.27
• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.7
• 6.2.8
• 6.2.9
• 6.2.10
• 6.2.11
• 6.2.12
• 6.2.13
• 6.2.14
• 6.3.0
• 6.3.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 269644
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53474

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.180/5.15.111/6.1.28/6.2.15/6.3.2
Patch: a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83/11c58a0c1937c157dbdf82d5ab634d68c99f3098/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e/67bb7521b6420d81dab7538c0686f18f7d6d09f4/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156

Timelineinfo

10/01/2025 Advisory disclosed
10/01/2025 +0 days CVE reserved
10/01/2025 +0 days VulDB entry created
01/20/2026 +111 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53474 (🔒)
GCVE (CVE): GCVE-0-2023-53474
GCVE (VulDB): GCVE-100-326553
CERT Bund: WID-SEC-2025-2187 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 10/01/2025 14:47
Updated: 01/20/2026 18:20
Changes: 10/01/2025 14:47 (57), 10/12/2025 00:03 (2), 11/24/2025 06:28 (7), 01/20/2026 18:20 (10)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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