CVE-2026-97540
Received Received - Intake

USB Pegasus Driver Dynamic ID Handling Flaw

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: pegasus: don't rely on id table pointer arithmetic The current code is broken when dynamic ID is involved; in such cases usb_device_id parameter of probe lives on the heap and the pointer arithmetic will get an index that is wildly out of bound. Instead of keeping a side table for additional information, use driver_info field of the usb_device_id. The dynamic ID parsing code needs to be updated for this; convert it to just write to the reserved entry for dynamic ID and remove the weird loop.

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Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-97540
EUVD
EUVD-2026-86848

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability affects the Linux kernel's USB Pegasus driver. The issue occurs when dynamic USB device IDs are used. The current code incorrectly relies on pointer arithmetic to access device information, which fails when IDs are dynamically allocated on the heap. This leads to out-of-bounds memory access. The fix involves using the driver_info field of the usb_device_id structure instead of maintaining a separate side table.

Detection Guidance

This vulnerability affects the Linux kernel's USB pegasus driver. Detection requires checking if the system uses a vulnerable kernel version with the pegasus driver. Inspect kernel version and loaded modules using commands like uname -a and lsmod | grep pegasus.

Impact Analysis

This vulnerability could allow an attacker to cause a denial of service or potentially execute arbitrary code on systems using the affected Linux kernel USB Pegasus driver. It may lead to system crashes, data corruption, or unauthorized access if exploited.

Mitigation Strategies

Update the Linux kernel to a patched version that resolves this issue. Monitor vendor advisories for kernel updates and apply them promptly. Disable the pegasus driver if not needed using modprobe -r pegasus.

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