CVE-2026-63904

Last refreshed2026-10-30

Status: UPDATED | Advisory ID: CVE-2026-63904

Key Details

CVE	CVE-2026-63904
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-30
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-125 (Out-of-bounds Read)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

usb: usbtmc: check URB actual_length for interrupt-IN notifications

USBTMC devices can use an optional interrupt endpoint for notification

messages. These typically contain two-byte headers indicating the

payload format, but the driver does not check if these headers are

present before accessing the data buffers. In cases where the URB

actual_length is not enough to fit these headers, the driver will either

cause an out-of-bounds read, or consume stale leftover data from a

previous notification.

Fix by checking if actual_data contains enough bytes for the headers,

otherwise resubmit URB to the interrupt endpoint. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-63904
CVE	https://www.cve.org/CVERecord?id=CVE-2026-63904

Source

Reference

NVD

CVE