CVE-2026-64345
usb: gadget: f_printer: take kref only for successful open
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 25, 2026 |
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Affected Versions
Linux / Linux
e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 94ec20d97aa51547965a539f660a1fe79c6929a3 e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 75c0ad13e136961328253742501b4efc3988a587 e8d5f92b8d30bb4ade76494490c3c065e12411b1 < bf20c94fa6aaff945f0ae3a23f3212cd299f28d9 e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 8a5eba992c862b0c94411eecf9b7121e8636db38 e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 7f1f24c367938c5537e2308bf9a965f051d14774 e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 30adce93d5c4a5a1ec29d9249e3fdfcc391d406b 25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc 4a47581cf010dc351d8069978080fdb000c0776d d9fe88b2a38dc700bf5bd3a09c7cd11bbc248367 cedb0187b8ba929c3f76f28e6bc25804d65f8a54 e9e791f5c39ab30e374a3b1a9c25ca7ff24988f3 34f026263889e2827e04acdc3a0eb9ecbd191ef0 5f845e5d18d151230476cf90aa46449f69ba2ef1 4.4.241 < 4.5 4.9.241 < 4.10 4.14.203 < 4.15 4.19.154 < 4.20 5.4.73 < 5.5 5.8.17 < 5.9 5.9.2 < 5.10
Linux / Linux
5.10
References
git.kernel.org: https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3 git.kernel.org: https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587 git.kernel.org: https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9 git.kernel.org: https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38 git.kernel.org: https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774 git.kernel.org: https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b