7.8

CVE-2026-64343

USB: ldusb: fix use-after-free on disconnect race

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")
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.26 < 5.10.261
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.212
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.178
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.145
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.96
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.39
Linux ≫ Linux Kernel Version >= 6.19 < 7.1.4
Linux ≫ Linux Kernel Version 7.2 Update rc1
Linux ≫ Linux Kernel Version 7.2 Update rc2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.075
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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