CVE-2025-39801: Linux kernel · usb: dwc3: Remove WARN_ON for device endpoint command timeouts
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f49697dfba2915a9ff36f94604eb76fa61413929 : update Linux kernel when convenient.
Data as of 5 Nov 2026, 21:35 UTC
Rated Medium 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 f49697dfba2915a9ff36f94604eb76fa61413929, dfe40159eec6ca63b40133bfa783eee2e3ed829f, db27482b9db340402e05d4e9b75352bbaca51af2 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Sep 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
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AI-suggested
A fix is available and has been applied in multiple Linux kernel commits. Users should update to a Linux kernel version that includes the referenced fixes (commits f49697dfba2915a9ff36f94604eb76fa61413929 and others). No additional mitigation is required beyond applying the official patch.
Description
CVE-2025-39801 addresses a Linux kernel vulnerability in the usb dwc3 driver where WARN_ON triggers on device endpoint command timeouts, causing kernel panic if panic_on_warn is enabled and unnecessary call trace logs otherwise. This occurs during fast software-controlled USB connect/disconnect sequences, particularly on Exynos platforms where control transfers from a previous connect may not complete before disconnect commands are processed. The fix removes WARN_ON to prevent kernel panics and reduce noise from expected timeout scenarios.
References
- git.kernel.org/stable/c/dfe40159eec6ca63b40133bfa783eee2e3ed829f (opens in a new tab)
- git.kernel.org/stable/c/5a1a847d841505dba2bd85602daf5c218e1d85b8 (opens in a new tab)
- git.kernel.org/stable/c/84c95dbf5bece56086cdb65a64162af35158bdd9 (opens in a new tab)
- git.kernel.org/stable/c/f49697dfba2915a9ff36f94604eb76fa61413929 (opens in a new tab)
- git.kernel.org/stable/c/db27482b9db340402e05d4e9b75352bbaca51af2 (opens in a new tab)
- git.kernel.org/stable/c/45eae113dccaf8e502090ecf5b3d9e9b805add6f (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-032379.html (opens in a new tab)