CVE-2025-38385: Linux kernel · net: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 7135056a49035597198280820c61b8c5dbe4a1d0 : update Linux kernel when convenient.
Data as of 5 Nov 2026, 21:20 UTC
Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-05.
- Patch
- Available – fixed in 7135056a49035597198280820c61b8c5dbe4a1d0, 968a419c95131e420f12bbdba19e96e2f6b071c4, 510a6095d754df9d727f644ec5076b7929d6c9ea +2
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 5 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel. Users should update to a kernel version that includes the fix identified by the provided commit hashes. No additional mitigation is required as the patch safely removes the redundant call causing the warning.
Description
A warning condition in the Linux kernel's lan78xx USB network driver was fixed by removing a redundant call to netif_napi_del() during device disconnect. The redundant call could trigger a WARN in __netif_napi_del_locked() because NAPI was still enabled, but unregister_netdev() already safely handles NAPI teardown. This fix prevents kernel warnings and potential instability during USB device disconnect events.
References
- git.kernel.org/stable/c/7135056a49035597198280820c61b8c5dbe4a1d0 (opens in a new tab)
- git.kernel.org/stable/c/968a419c95131e420f12bbdba19e96e2f6b071c4 (opens in a new tab)
- git.kernel.org/stable/c/510a6095d754df9d727f644ec5076b7929d6c9ea (opens in a new tab)
- git.kernel.org/stable/c/17a37b9a5dd945d86110838fb471e7139ba993a2 (opens in a new tab)
- git.kernel.org/stable/c/6c7ffc9af7186ed79403a3ffee9a1e5199fc7450 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)