CVE-2026-63962
kernel: usb: typec: tcpm: bound altmode_desc[] per iteration in svdm_consume_modes()
Severity
ImportantRed 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 Type-C Port Manager (TCPM) driver. A remote attacker, acting as a malicious USB-C port partner, could exploit an out-of-bounds write vulnerability in the svdm_consume_modes() function. By sending an unsolicited 'Discover Modes ACK' with excessive data, the attacker can cause memory corruption. This could lead to a denial of service or potentially arbitrary code execution on the affected system.
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