Use-after-free error in Linux kernel - CVE-2017-17975
Published: March 28, 2018
Vulnerability identifier: #VU11313
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-2017-17975
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the usbtv_probe function in drivers/media/usb/usbtv/usbtv-core.c due to use-after-free error. A local attacker can trigger failure of audio registration, because a kfree of the usbtv data structure occurs during a usbtv_video_free call, but the usbtv_video_fail label's code attempts to both access and free this data structure.
The weakness exists in the usbtv_probe function in drivers/media/usb/usbtv/usbtv-core.c due to use-after-free error. A local attacker can trigger failure of audio registration, because a kfree of the usbtv data structure occurs during a usbtv_video_free call, but the usbtv_video_fail label's code attempts to both access and free this data structure.
Affected software
Linux kernel
Debian Linux
SUSE Linux
Debian Linux
SUSE Linux
How to mitigate CVE-2017-17975
Install update from vendor's website.