Linux Kernel up to 6.14.2/6.15-rc1 erratum_1386_microcode null termination

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.14.2/6.15-rc1. This affects the function erratum_1386_microcode. Performing a manipulation results in null termination. This vulnerability is identified as CVE-2025-37751. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.14.2/6.15-rc1. This affects the function erratum_1386_microcode. The manipulation with an unknown input leads to a null termination vulnerability. CWE is classifying the issue as CWE-170. The product does not terminate or incorrectly terminates a string or array with a null character or equivalent terminator. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: x86/cpu: Avoid running off the end of an AMD erratum table The NULL array terminator at the end of erratum_1386_microcode was removed during the switch from x86_cpu_desc to x86_cpu_id. This causes readers to run off the end of the array. Replace the NULL.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-37751 since 04/16/2025. The exploitability is told to be easy. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/15/2026).

The vulnerability scanner Nessus provides a plugin with the ID 240657 (Ubuntu 25.04 : Linux kernel vulnerabilities (USN-7594-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.14.3 or 6.15-rc2 eliminates this vulnerability. Applying the patch 1b518f73f1b6f59e083ec33dea22d9a1a275a970/f0df00ebc57f803603f2a2e0df197e51f06fbe90 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 (240657) and CERT Bund (WID-SEC-2025-0922). Statistical analysis made it clear that VulDB provides the best quality 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
  • Dell Avamar
  • Open Source Linux Kernel
  • IBM DataPower Gateway
  • Dell NetWorker
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null termination
CWE: CWE-170 / CWE-119
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: 240657
Nessus Name: Ubuntu 25.04 : Linux kernel vulnerabilities (USN-7594-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.14.3/6.15-rc2
Patch: 1b518f73f1b6f59e083ec33dea22d9a1a275a970/f0df00ebc57f803603f2a2e0df197e51f06fbe90

Timelineinfo

04/16/2025 🔍
05/01/2025 +15 days 🔍
05/01/2025 +0 days 🔍
03/15/2026 +318 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-37751 (🔍)
GCVE (CVE): GCVE-0-2025-37751
GCVE (VulDB): GCVE-100-306891
CERT Bund: WID-SEC-2025-0922 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 05/01/2025 15:51
Updated: 03/15/2026 18:17
Changes: 05/01/2025 15:51 (58), 06/27/2025 11:01 (2), 07/28/2025 04:19 (7), 11/07/2025 10:04 (12), 01/31/2026 22:15 (1), 03/15/2026 18:17 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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