Use after free in Linux kernel - CVE-2017-16648
Published: November 8, 2017 / Updated: October 31, 2018
Vulnerability identifier: #VU92790
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-16648
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The dvb_frontend_free function in drivers/media/dvb-core/dvb_frontend.c in the Linux kernel through 4.13.11 allows local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via a crafted USB device. NOTE: the function was later renamed __dvb_frontend_free.
Affected software
Linux kernel
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Fedora
kernel
kernel-alt (Red Hat package)
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Fedora
kernel
kernel-alt (Red Hat package)
How to mitigate CVE-2017-16648
Install update from vendor's repository.
kernel - addressed in versions 4.13.16-100.fc25, 4.13.16-200.fc26, 4.13.16-300.fc27
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a