High 7.8Published Jul 25, 2026

CVE-2026-64343USB: ldusb: fix use-after-free on disconnect race

Updated under an hour ago (Oct 26, 2026, 10:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: USB: ldusb: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked")

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: Linux
NVD analysis: Analyzed
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ce0d7d3f575fc1ba6a89c3c651e710355590daff before fc55923a972e715f9a27187b47d4920709e23d85; from ce0d7d3f575fc1ba6a89c3c651e710355590daff before e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69; from ce0d7d3f575fc1ba6a89c3c651e710355590daff before af59829e67e11ba2511a9f8e4b9111afc7d1f550; from ce0d7d3f575fc1ba6a89c3c651e710355590daff before 02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4; from ce0d7d3f575fc1ba6a89c3c651e710355590daff before d8f69404e1d671326f86d378b9f5bfbd56490e9d; from ce0d7d3f575fc1ba6a89c3c651e710355590daff before 2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915; from ce0d7d3f575fc1ba6a89c3c651e710355590daff before a3e794136ab5e3ad1e7019175a4b837aec86db4b; from ce0d7d3f575fc1ba6a89c3c651e710355590daff before 19bdfc7b3c179331eafa423d87e1336f43bbfeb8	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.26 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 7.2; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85	patch
https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69	patch
https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550	patch
https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4	patch
https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d	patch
https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915	patch
https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b	patch
https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8	patch

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.