CVE - CVE-2025-21689

CVE-ID
CVE-2025-21689	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb() This patch addresses a null-ptr-deref in qt2_process_read_urb() due to an incorrect bounds check in the following: if (newport > serial->num_ports) { dev_err(&port->dev, "%s - port change to invalid port: %i\n", __func__, newport); break; } The condition doesn't account for the valid range of the serial->port buffer, which is from 0 to serial->num_ports - 1. When newport is equal to serial->num_ports, the assignment of "port" in the following code is out-of-bounds and NULL: serial_priv->current_port = newport; port = serial->port[serial_priv->current_port]; The fix checks if newport is greater than or equal to serial->num_ports indicating it is out-of-bounds.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530 URL:https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530 MISC:https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade URL:https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade MISC:https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe URL:https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe MISC:https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f URL:https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f MISC:https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b URL:https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b MISC:https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507 URL:https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507 MISC:https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470 URL:https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470 MISC:https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22 URL:https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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