Use-after-free in Linux kernel - CVE-2026-64343
Published: July 27, 2026
Vulnerability identifier: #VU139634
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64343
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a use-after-free.
The vulnerability exists due to use-after-free in the ldusb driver when release() races with disconnect(). A local user can trigger a device disconnect while releasing the device to cause a use-after-free.
The issue affects the drivers/usb/misc/ldusb.c code path in the Linux kernel.
Affected software
Linux kernel
How to mitigate CVE-2026-64343
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4
- https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8
- https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915
- https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b
- https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550
- https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d
- https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69
- https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85