CVE-2026-64345
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_printer: take kref only for successful open printer_open() returns -EBUSY when the character device is already open, but it increments dev->kref regardless of the return value. VFS does not call ->release() for a failed open, so every rejected second open permanently leaks one reference. Move kref_get() into the successful-open branch.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedJul 25, 2026
First seenJul 25, 2026
How to fix
Update
- linux linux_kernel4.5, 4.10, 4.15, 4.20, 5.5, 5.9, 5.10.261, 6.6.145, 6.12.96, 6.18.39, 7.1.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.4.241 ≤ v < 4.5, 4.9.241 ≤ v < 4.10, 4.14.203 ≤ v < 4.15, 4.19.154 ≤ v < 4.20, 5.4.73 ≤ v < 5.5, 5.8.17 ≤ v < 5.9, 5.9.2 ≤ v < 5.10.261, 5.11 ≤ v < 6.6.145, 6.7 ≤ v < 6.12.96, 6.13 ≤ v < 6.18.39, 6.19 ≤ v < 7.1.4, 7.2 | 4.5, 4.10, 4.15, 4.20, 5.5, 5.9, 5.10.261, 6.6.145, 6.12.96, 6.18.39, 7.1.4 |
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