Linux Kernel up to 6.19-rc3 ASIX Driver mdio_bus.c asix_read_phy_addr information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.1.159/6.6.119/6.12.63/6.18.3/6.19-rc3 and classified as critical. Affected by this issue is the function asix_read_phy_addr of the file drivers/net/phy/mdio_bus.c of the component ASIX Driver. This manipulation causes information disclosure. This vulnerability appears as CVE-2025-71094. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.1.159/6.6.119/6.12.63/6.18.3/6.19-rc3. It has been declared as problematic. Affected by this vulnerability is the function asix_read_phy_addr of the file drivers/net/phy/mdio_bus.c of the component ASIX Driver. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net: usb: asix: validate PHY address before use The ASIX driver reads the PHY address from the USB device via asix_read_phy_addr(). A malicious or faulty device can return an invalid address (>= PHY_MAX_ADDR), which causes a warning in mdiobus_get_phy(): addr 207 out of range WARNING: drivers/net/phy/mdio_bus.c:76 Validate the PHY address in asix_read_phy_addr() and remove the now-redundant check in ax88172a.c.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2025-71094 since 01/13/2026. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 298917 (SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0472-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.160, 6.6.120, 6.12.64, 6.18.4 or 6.19-rc4 eliminates this vulnerability. Applying the patch f5f4f30f3811d37e1aa48667c36add74e5a8d99f/38722e69ee64dbb020028c93898d25d6f4c0e0b2/98a12c2547a44a5f03f35c108d2022cc652cbc4d/bf8a0f3b787ca7c5889bfca12c60c483041fbee3/a1e077a3f76eea0dc671ed6792e7d543946227e8 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 vulnerability database at Tenable (298917). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 298917
Nessus Name: SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0472-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.160/6.6.120/6.12.64/6.18.4/6.19-rc4
Patch: f5f4f30f3811d37e1aa48667c36add74e5a8d99f/38722e69ee64dbb020028c93898d25d6f4c0e0b2/98a12c2547a44a5f03f35c108d2022cc652cbc4d/bf8a0f3b787ca7c5889bfca12c60c483041fbee3/a1e077a3f76eea0dc671ed6792e7d543946227e8

Timelineinfo

01/13/2026 Advisory disclosed
01/13/2026 +0 days CVE reserved
01/13/2026 +0 days VulDB entry created
03/25/2026 +71 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71094 (🔒)
GCVE (CVE): GCVE-0-2025-71094
GCVE (VulDB): GCVE-100-340693

Entryinfo

Created: 01/13/2026 18:05
Updated: 03/25/2026 19:13
Changes: 01/13/2026 18:05 (60), 02/15/2026 00:59 (2), 03/25/2026 19:13 (11)
Complete: 🔍
Cache ID: 216::103

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