CVE-2026-43140: Linux kernel · HID: magicmouse: Do not crash on missing msc->input
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f6a3860241fbb556fd72332fa31c5e787004413b : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:04 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, 2026-11-06.
- Patch
- Available – fixed in f6a3860241fbb556fd72332fa31c5e787004413b, db5ba06e7af9325519a03e52fccf4a9e7c1fd9b2, 165912d4321c692321c02793068d30700b4e0f1a +5
Exploitation evidence
Disclosed: evidence found.
CVE published 6 May 2026
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 6 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 has been implemented in the Linux kernel to detect and reject devices that cause the msc->input pointer to remain NULL, preventing the crash. Users should update to a Linux kernel version that includes the fix identified by the listed commit hashes. No additional mitigation is required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's HID magicmouse driver could cause a system crash when a fake USB device sends a crafted report descriptor that bypasses normal input mapping, leaving a critical pointer null. This flaw is triggered by devices impersonating a magic mouse and leads to a crash due to missing input configuration. The issue has been fixed by detecting and rejecting such devices during input configuration.
References
- git.kernel.org/stable/c/db5ba06e7af9325519a03e52fccf4a9e7c1fd9b2 (opens in a new tab)
- git.kernel.org/stable/c/165912d4321c692321c02793068d30700b4e0f1a (opens in a new tab)
- git.kernel.org/stable/c/f6a3860241fbb556fd72332fa31c5e787004413b (opens in a new tab)
- git.kernel.org/stable/c/243e1165eb03aca97d87aafa9c3130593837a1c2 (opens in a new tab)
- git.kernel.org/stable/c/922bd3e498a4b8e445def6e6ffea2ad3682ad516 (opens in a new tab)
- git.kernel.org/stable/c/5bbe266272d86c0657e8253600f3d5b74fb7b2ae (opens in a new tab)
- git.kernel.org/stable/c/36c83c1329dd881f290f7df2feadfb9a21775108 (opens in a new tab)
- git.kernel.org/stable/c/17abd396548035fbd6179ee1a431bd75d49676a7 (opens in a new tab)