CVE-2025-21689 — NULL Pointer Dereference in Linux
Severity
5.5MEDIUMNVD
OSV7.8OSV5.9
EPSS
0.0%
top 97.67%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedFeb 10
Latest updateJul 17
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.…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages8 packages
▶CVEListV5linux/linuxf7a33e608d9ae022b7f49307921627e34e9484ed — fa4c7472469d97c4707698b4c0e098f8cfc2bf22+8