CVE-2026-80765HID: hyperv: validate initial device info bounds
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b95f5bcb811e3905b5376f87789da8d097fee682 before e0d5d3e45e142b7ef7525654aaa54d3e986002a6; from b95f5bcb811e3905b5376f87789da8d097fee682 before 390d3d9c52a710fdc9de95a537747397c0c671d1; from b95f5bcb811e3905b5376f87789da8d097fee682 before 8614c043b11cc35ffebd35542ab4da275f8f923d; from b95f5bcb811e3905b5376f87789da8d097fee682 before 334271d3812ab3197c95b4593bc6745f8d189114; from b95f5bcb811e3905b5376f87789da8d097fee682 before f84d777574b748b1a488723ca7be9d87a301a872; from b95f5bcb811e3905b5376f87789da8d097fee682 before 608f8fd8c0f7b6268da43509447802955f210aac; from b95f5bcb811e3905b5376f87789da8d097fee682 before 2529737763cb4bcfcaf397beeea2664656c865b4; from b95f5bcb811e3905b5376f87789da8d097fee682 before c894143c508a7e063aab9f73c9e835ab40121283; and 1 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6
- https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1
- https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d
- https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114
- https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872
- https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac
- https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4
- https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283
- https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.