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.
Affected products
linux: linux kernel
References7
- git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b Patch
- git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587 Patch
- git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774 Patch
- git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38 Patch
- git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3 Patch
- git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9 Patch
- git.kernel.org/stable/c/a12d81a9cc2a012a24ecb7f9ba076b9f7c179bd3
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 14 November 2026
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