CVE-2026-64345usb: gadget: f_printer: take kref only for successful open
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected e8d5f92b8d30bb4ade76494490c3c065e12411b1 – < 94ec20d97aa51547965a539f660a1fe79c6929a3
- affected e8d5f92b8d30bb4ade76494490c3c065e12411b1 – < a12d81a9cc2a012a24ecb7f9ba076b9f7c179bd3
- affected e8d5f92b8d30bb4ade76494490c3c065e12411b1 – < 75c0ad13e136961328253742501b4efc3988a587
- affected e8d5f92b8d30bb4ade76494490c3c065e12411b1 – < bf20c94fa6aaff945f0ae3a23f3212cd299f28d9
- affected e8d5f92b8d30bb4ade76494490c3c065e12411b1 – < 8a5eba992c862b0c94411eecf9b7121e8636db38
- affected e8d5f92b8d30bb4ade76494490c3c065e12411b1 – < 7f1f24c367938c5537e2308bf9a965f051d14774
- affected e8d5f92b8d30bb4ade76494490c3c065e12411b1 – < 30adce93d5c4a5a1ec29d9249e3fdfcc391d406b
- affected 25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc
- affected 4a47581cf010dc351d8069978080fdb000c0776d
- affected d9fe88b2a38dc700bf5bd3a09c7cd11bbc248367
- affected cedb0187b8ba929c3f76f28e6bc25804d65f8a54
- affected e9e791f5c39ab30e374a3b1a9c25ca7ff24988f3
- affected 34f026263889e2827e04acdc3a0eb9ecbd191ef0
- affected 5f845e5d18d151230476cf90aa46449f69ba2ef1
- affected 4.4.241 – < 4.5
- affected 4.9.241 – < 4.10
- affected 4.14.203 – < 4.15
- affected 4.19.154 – < 4.20
- affected 5.4.73 – < 5.5
- affected 5.8.17 – < 5.9
- affected 5.9.2 – < 5.10
- affected 5.10
- unaffected < 5.10
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3 (opens in a new tab)
- https://git.kernel.org/stable/c/a12d81a9cc2a012a24ecb7f9ba076b9f7c179bd3 (opens in a new tab)
- https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587 (opens in a new tab)
- https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9 (opens in a new tab)
- https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38 (opens in a new tab)
- https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774 (opens in a new tab)
- https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48889 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64345)Record last updated .