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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
f7a33e608d9ae022b7f49307921627e34e9484ed to < fa4c7472469d97c4707698b4c0e098f8cfc2bf22affectedf7a33e608d9ae022b7f49307921627e34e9484ed to < 94770cf7c5124f0268d481886829dc2beecc4507affectedf7a33e608d9ae022b7f49307921627e34e9484ed to < 6068dcff7f19e9fa6fa23ee03453ad6a40fa4efeaffectedf7a33e608d9ae022b7f49307921627e34e9484ed to < 4b9b41fabcd38990f69ef0cee9c631d954a2b530affectedf7a33e608d9ae022b7f49307921627e34e9484ed to < 6377838560c03b36e1153a42ef727533def9b68faffectedf7a33e608d9ae022b7f49307921627e34e9484ed to < f371471708c7d997f763b0e70565026eb67cc470affectedf7a33e608d9ae022b7f49307921627e34e9484ed to < 8542b33622571f54dfc2a267fce378b6e3840b8baffectedf7a33e608d9ae022b7f49307921627e34e9484ed to < 575a5adf48b06a2980c9eeffedf699ed5534fadeaffected
Linux Linux
Default version status: affected
3.5affected0 to < 3.5unaffected5.4.290 to ≤ 5.4.*unaffected5.10.234 to ≤ 5.10.*unaffected5.15.178 to ≤ 5.15.*unaffected6.1.128 to ≤ 6.1.*unaffected6.6.75 to ≤ 6.6.*unaffected6.12.12 to ≤ 6.12.*unaffected6.13.1 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22 ↗
- https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507 ↗
- https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe ↗
- https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530 ↗
- https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f ↗
- https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470 ↗
- https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b ↗
- https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗