CVE-2026-64345In 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,…
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Sep 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 4.4.241 before 4.5; from 4.9.241 before 4.10; from 4.14.203 before 4.15; from 4.19.154 before 4.20; from 5.4.73 before 5.5; from 5.8.17 before 5.9; from 5.9.2 before 5.10.261; from 5.11 before 6.6.145; and 5 more ranges | NVD |
References
- https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406bpatch
- https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587patch
- https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774patch
- https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38patch
- https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3patch
- https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.