CVE-2025-39808: Linux kernel · HID: hid-ntrig: fix unable to handle page fault in ntrig_report_version()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e422370e6ab28478872b914cee5d49a9bdfae0c6 : 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 e422370e6ab28478872b914cee5d49a9bdfae0c6, 6070123d5344d0950f10ef6a5fdc3f076abb7ad2, 98520a9a3d69a530dd1ee280cbe0abc232a35bff +5
Exploitation evidence
Disclosed: evidence found.
CVE published 16 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 their Linux kernel to a version including these fixes to remediate the vulnerability.
Description
A vulnerability in the Linux kernel's HID subsystem (hid-ntrig driver) could cause a page fault due to a null pointer dereference in the ntrig_report_version() function. This occurs when the hdev parameter's device parent hierarchy is unexpectedly null, leading to an invalid USB device address and triggering a page fault. The issue has been fixed by adding a null check before calling hid_to_usb_dev().
References
- git.kernel.org/stable/c/22ddb5eca4af5e69dffe2b54551d2487424448f1 (opens in a new tab)
- git.kernel.org/stable/c/019c34ca11372de891c06644846eb41fca7c890c (opens in a new tab)
- git.kernel.org/stable/c/4338b0f6544c3ff042bfbaf40bc9afe531fb08c7 (opens in a new tab)
- git.kernel.org/stable/c/6070123d5344d0950f10ef6a5fdc3f076abb7ad2 (opens in a new tab)
- git.kernel.org/stable/c/e422370e6ab28478872b914cee5d49a9bdfae0c6 (opens in a new tab)
- git.kernel.org/stable/c/98520a9a3d69a530dd1ee280cbe0abc232a35bff (opens in a new tab)
- git.kernel.org/stable/c/183def8e4d786e50165e5d992df6a3083e45e16c (opens in a new tab)
- git.kernel.org/stable/c/185c926283da67a72df20a63a5046b3b4631b7d9 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-032379.html (opens in a new tab)