Use-after-free in Linux kernel - CVE-2016-9794
Published: December 28, 2016 / Updated: January 17, 2023
Vulnerability identifier: #VU90822
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-9794
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 vulnerability exists due to a use-after-free error within the snd_pcm_period_elapsed() function in sound/core/pcm_lib.c. A local user can execute arbitrary code.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
Ubuntu
linux (Ubuntu package)
How to mitigate CVE-2016-9794
Install update from vendor's website.
linux (Ubuntu package) - addressed in versions 3.2.0-120.163, 3.13.0-107.154, 4.4.0-59.80
External References
- https://patchwork.kernel.org/patch/8752621/
- https://github.com/torvalds/linux/commit/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4
- https://bugzilla.redhat.com/show_bug.cgi?id=1401494
- http://www.openwall.com/lists/oss-security/2016/12/03/2
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4
- http://www.securityfocus.com/bid/94654
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html
- https://source.android.com/security/bulletin/2017-05-01
- http://rhn.redhat.com/errata/RHSA-2016-2574.html