Linux Kernel up to 6.6.78/6.12.15/6.13.3/6.14-rc2 etas_es58x 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 described as critical has been identified in Linux Kernel up to 6.6.78/6.12.15/6.13.3/6.14-rc2. This affects an unknown function of the component etas_es58x. Executing a manipulation can lead to null pointer dereference. This vulnerability appears as CVE-2025-21773. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.6.78/6.12.15/6.13.3/6.14-rc2 and classified as critical. This vulnerability affects an unknown code block of the component etas_es58x. 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: fix potential NULL pointer dereference on udev->serial The driver assumed that es58x_dev->udev->serial could never be NULL. While this is true on commercially available devices, an attacker could spoof the device identity providing a NULL USB serial number. That would trigger a NULL pointer dereference. Add a check on es58x_dev->udev->serial before accessing it.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2025-21773 since 12/29/2024. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 236983 (Ubuntu 24.04 LTS / 24.10 : Linux kernel vulnerabilities (USN-7521-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.79, 6.12.16, 6.13.4 or 6.14-rc3 eliminates this vulnerability. Applying the patch 1590667a60753ee5a54871f2840ceefd4a7831fa/722e8e1219c8b6ac2865011fe339315d6a8d0721/5059ea98d7bc133903d3e47ab36df6ed11d0c95f/a1ad2109ce41c9e3912dadd07ad8a9c640064ffb 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 (236983) and CERT Bund (WID-SEC-2025-0453). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Siemens SIMATIC S7
  • RESF Rocky Linux
  • Dell NetWorker
  • Dell Avamar
  • Red Hat OpenShift
  • IBM QRadar SIEM
  • SolarWinds Security Event Manager
  • Dell PowerProtect Data Domain
  • Open Source Linux Kernel
  • IBM DataPower Gateway
  • Dell Secure Connect Gateway
  • Dell PowerScale OneFS
  • Dell ECS

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

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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: 236983
Nessus Name: Ubuntu 24.04 LTS / 24.10 : Linux kernel vulnerabilities (USN-7521-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.6.79/6.12.16/6.13.4/6.14-rc3
Patch: 1590667a60753ee5a54871f2840ceefd4a7831fa/722e8e1219c8b6ac2865011fe339315d6a8d0721/5059ea98d7bc133903d3e47ab36df6ed11d0c95f/a1ad2109ce41c9e3912dadd07ad8a9c640064ffb

Timelineinfo

12/29/2024 🔍
02/27/2025 +60 days 🔍
02/27/2025 +0 days 🔍
05/25/2026 +452 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21773 (🔍)
GCVE (CVE): GCVE-0-2025-21773
GCVE (VulDB): GCVE-100-297778
CERT Bund: WID-SEC-2025-0453 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/27/2025 09:13
Updated: 05/25/2026 11:53
Changes: 02/27/2025 09:13 (59), 05/21/2025 01:39 (2), 10/26/2025 04:39 (7), 11/10/2025 06:21 (1), 01/18/2026 10:39 (1), 05/25/2026 11:53 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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