cbcvebase.
CVE-2025-21689
published 2025-02-10

CVE-2025-21689: 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…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
12.8th percentile
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.

Affected

27 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.128-1 (bookworm)linux 6.1.128-1 (bookworm)
debianlinux-6.1< linux 6.1.128-1 (bookworm)linux 6.1.128-1 (bookworm)
linuxlinux
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < fa4c7472469d97c4707698b4c0e098f8cfc2bf22fa4c7472469d97c4707698b4c0e098f8cfc2bf22
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < 94770cf7c5124f0268d481886829dc2beecc450794770cf7c5124f0268d481886829dc2beecc4507
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < 6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < 4b9b41fabcd38990f69ef0cee9c631d954a2b5304b9b41fabcd38990f69ef0cee9c631d954a2b530
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < 6377838560c03b36e1153a42ef727533def9b68f6377838560c03b36e1153a42ef727533def9b68f
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < f371471708c7d997f763b0e70565026eb67cc470f371471708c7d997f763b0e70565026eb67cc470
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < 8542b33622571f54dfc2a267fce378b6e3840b8b8542b33622571f54dfc2a267fce378b6e3840b8b
linuxlinux>= f7a33e608d9ae022b7f49307921627e34e9484ed < 575a5adf48b06a2980c9eeffedf699ed5534fade575a5adf48b06a2980c9eeffedf699ed5534fade
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.128-16.1.128-1
linuxlinux_kernel>= 0 < 6.12.12-16.12.12-1
linuxlinux_kernel>= 0 < 6.12.12-16.12.12-1
linuxlinux_kernel>= 0 < 5.4.0-211.2315.4.0-211.231
linuxlinux_kernel>= 0 < 5.15.0-135.1465.15.0-135.146
linuxlinux_kernel>= 0 < 6.8.0-62.656.8.0-62.65
linuxlinux_kernel>= 3.5 < 5.4.2905.4.290
linuxlinux_kernel>= 5.11 < 5.15.1785.15.178
linuxlinux_kernel>= 5.16 < 6.1.1286.1.128
linuxlinux_kernel>= 5.5 < 5.10.2345.10.234
linuxlinux_kernel>= 6.2 < 6.6.756.6.75
linuxlinux_kernel>= 6.7 < 6.12.126.12.12

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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