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CVE-2026-96582

Out-of-bounds Read via Check-after-use in the USBX HID Report Descriptor Parser

4.9 Medium

A HID report descriptor is a sequence of items, each declaring in its header how many data bytes follow. The USBX host walks that sequence by advancing over each header and parsing the data behind it.

The walk checked that an item fitted in the descriptor only after it had advanced past the header and parsed the payload, and the item analysis it relied on never measured the declared sizes against the bytes actually received. A HID peripheral returning a short report descriptor therefore drove a heap out-of-bounds read during ordinary enumeration.

Attack profile

How easy it is to exploit

Attack vector
Physical
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
High

Exploit likelihood

0.17%Unchanged since Oct 21, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.9

Out-of-bounds Read via Check-after-use in the USBX HID Report Descriptor Parser

A HID report descriptor is a sequence of items, each declaring in its header how many data bytes follow. The USBX host walks that sequence by advancing over each header and parsing the data behind it.

The walk checked that an item fitted in the descriptor only after it had advanced past the header and parsed the payload, and the item analysis it relied on never measured the declared sizes against the bytes actually received. A HID peripheral returning a short report descriptor therefore drove a heap out-of-bounds read during ordinary enumeration.

Record
CVE-2026-96582
CVSS 3.1
4.9 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-125, CWE-1285
Updated
2026-11-02
EUVDEUVD-2026-105000 4.9

A HID report descriptor is a sequence of items, each declaring in its header how many data bytes follow. The USBX host walks that sequence by advancing over each header and parsing the data behind it.

The walk checked that an item fitted in the descriptor only after it had advanced past the header and parsed the payload, and the item analysis it relied on never measured the declared sizes against the bytes actually received. A HID peripheral returning a short report descriptor therefore drove a heap out-of-bounds read during ordinary enumeration.

Record
EUVD-2026-105000
CVSS 3.1
4.9 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
NVD 4.9

A HID report descriptor is a sequence of items, each declaring in its header how many data bytes follow. The USBX host walks that sequence by advancing over each header and parsing the data behind it.

The walk checked that an item fitted in the descriptor only after it had advanced past the header and parsed the payload, and the item analysis it relied on never measured the declared sizes against the bytes actually received. A HID peripheral returning a short report descriptor therefore drove a heap out-of-bounds read during ordinary enumeration.

Record
CVE-2026-96582
CVSS 3.1
4.9 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-125, CWE-1285
Updated
2026-11-02
OSV 4.9

Out-of-bounds Read via Check-after-use in the USBX HID Report Descriptor Parser

A HID report descriptor is a sequence of items, each declaring in its header how many data bytes follow. The USBX host walks that sequence by advancing over each header and parsing the data behind it.

The walk checked that an item fitted in the descriptor only after it had advanced past the header and parsed the payload, and the item analysis it relied on never measured the declared sizes against the bytes actually received. A HID peripheral returning a short report descriptor therefore drove a heap out-of-bounds read during ordinary enumeration.

Record
CVE-2026-96582
CVSS 3.1
4.9 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-125, CWE-1285
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-96582 is a medium vulnerability (CVSS 4.9) in Eclipse Foundation Threadx - Usbx, published October 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. No source names a fixed version.

References

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