CVE-2023-53356
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Add null pointer check in gserial_suspend Consider a case where gserial_disconnect has already cleared gser->ioport. And if gserial_suspend gets called afterwards, it will lead to accessing of gser->ioport and thus causing null pointer dereference. Avoid this by adding a null pointer check. Added a static spinlock to prevent gser->ioport from becoming null after the newly added null pointer check.
SeverityMedium
CVSS5.5
Exploit probability9. percentile0.2%
Product
Linux Kernel
PublishedSep 17, 2025
First seenSep 17, 2025
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linux linux_kernel5.10.188, 5.15.121, 6.1.39, 6.4.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.8 ≤ v < 5.10.188, 5.11 ≤ v < 5.15.121, 5.16 ≤ v < 6.1.39, 6.2 ≤ v < 6.4.4 | 5.10.188, 5.15.121, 6.1.39, 6.4.4 |
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