CVE-2025-71094: Linux kernel · net: usb: asix: validate PHY address before use
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 5.15.0-1103.110~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1103.110~20.04.1, 5.15.0-1110.119~20.04.1, 5.15.0-1103.112~20.04.1 +70
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 13 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 25.10linuxpkg:deb/ubuntu/linux@6.17.0-22.22?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1012.12?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1013.13?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp@6.17.0-1012.12?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle@6.17.0-1011.11?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and should be applied to affected Linux kernel versions. The fix validates the PHY address before use in the ASIX driver, preventing invalid addresses from causing warnings or instability. Users should update their Linux kernel to the fixed versions as provided by their distribution vendors, such as the Ubuntu security notice USN-8096-1. No additional mitigation steps are required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's ASIX USB network driver was resolved by validating the PHY address before use. The ASIX driver previously read the PHY address from a USB device without proper validation, allowing a malicious or faulty device to return an invalid PHY address, causing warnings and potential instability. This issue has been fixed by adding validation in the asix_read_phy_addr() function and removing redundant checks. The vulnerability affects specific Linux kernel versions and has a medium severity score. A patch is available as part of broader Linux kernel security updates.
References
- ubuntu.com/security/CVE-2025-71094 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-71094 (opens in a new tab)
- git.kernel.org/linus/a1e077a3f76eea0dc671ed6792e7d543946227e8 (opens in a new tab)
- git.kernel.org/stable/c/38722e69ee64dbb020028c93898d25d6f4c0e0b2 (opens in a new tab)
- git.kernel.org/stable/c/98a12c2547a44a5f03f35c108d2022cc652cbc4d (opens in a new tab)
- git.kernel.org/stable/c/a1e077a3f76eea0dc671ed6792e7d543946227e8 (opens in a new tab)
- git.kernel.org/stable/c/bf8a0f3b787ca7c5889bfca12c60c483041fbee3 (opens in a new tab)
- git.kernel.org/stable/c/f5f4f30f3811d37e1aa48667c36add74e5a8d99f (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8116-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-8141-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8163-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8163-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8177-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8179-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8177-2 (opens in a new tab)