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CVE-2026-80765 Affecting python3-perf package, versions <1:6.1.186-228.374.amzn2023

Severity

 Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.2% (10th percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHON3PERF-19820221
  • published15 Sept 2026
  • disclosed4 Sept 2026
Report a new vulnerability Found a mistake?

Introduced: 4 Sep 2026

NewCVE-2026-80765  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python3-perf to version 1:6.1.186-228.374.amzn2023 or higher.
This issue was patched in ALAS2023-2026-2143.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-perf package and not the python3-perf package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.