CVE-2026-63928
kernel: USB: serial: omninet: fix memory corruption with small endpoint
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · October 31, 2026
Description
A flaw was found in the Linux kernel's USB serial omninet driver. A malicious Universal Serial Bus (USB) device could exploit this by reporting a smaller maximum packet size than anticipated. This action would cause the system to allocate undersized data buffers, leading to memory corruption. Such corruption could allow an attacker to trigger a denial of service or potentially execute unauthorized code.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 · Out-of-bounds Write