CVE-2026-80765: Linux kernel · HID: hyperv: validate initial device info bounds
Source GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
Description
In the Linux kernel, the following vulnerability has been resolved: HID: hyperv: validate initial device info bounds The Hyper-V synthetic HID host supplies SYNTH_HID_INITIAL_DEVICE_INFO messages that contain a HID descriptor followed by the report descriptor bytes. mousevsc_on_receive_device_info() trusts bLength and wDescriptorLength without checking that the received packet contains both byte ranges. A malformed host or backend message can therefore make the guest read past the received VMBus packet while copying the report descriptor. Pass the received initial-device-info size into the parser and reject descriptor lengths that exceed the packet. Impact: A malicious Hyper-V host or backend can crash a guest by sending a short initial device-info message with an oversized HID report descriptor length.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80765 (opens in a new tab)
- git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4 (opens in a new tab)
- git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114 (opens in a new tab)
- git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1 (opens in a new tab)
- git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac (opens in a new tab)
- git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d (opens in a new tab)
- git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0 (opens in a new tab)
- git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283 (opens in a new tab)
- git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6 (opens in a new tab)
- git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872 (opens in a new tab)