CVE-2026-80765: Linux kernel · HID: hyperv: validate initial device info bounds
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f84d777574b748b1a488723ca7be9d87a301a872 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:40 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
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 f84d777574b748b1a488723ca7be9d87a301a872, e0d5d3e45e142b7ef7525654aaa54d3e986002a6, c894143c508a7e063aab9f73c9e835ab40121283 +6
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 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
This vulnerability has been fixed in the Linux kernel. Users should update to a fixed kernel version containing the patches identified by the provided commit hashes. Since this is not a cloud service, manual patching is required. Patch status is confirmed by the presence of fixed versions.
Description
A vulnerability in the Linux kernel's Hyper-V synthetic HID host component allows a malicious Hyper-V host or backend to crash a guest by sending a malformed initial device-info message with an oversized HID report descriptor length. This occurs because the kernel did not properly validate the bounds of the HID descriptor and report descriptor bytes, potentially causing out-of-bounds reads.
References
- git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6 (opens in a new tab)
- git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1 (opens in a new tab)
- git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d (opens in a new tab)
- git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114 (opens in a new tab)
- git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872 (opens in a new tab)
- git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac (opens in a new tab)
- git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4 (opens in a new tab)
- git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283 (opens in a new tab)
- git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0 (opens in a new tab)