#VU20815 Use-after-free in Linux kernel - CVE-2019-15214
Published: September 3, 2019
Vulnerability identifier: #VU20815
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2019-15214
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists in the Advanced Linux Sound Architecture (ALSA) subsystem in "sound/core/init.c" and "sound/core/info.c" due to the card disconnection causes certain data structures to be deleted too early. A local authenticated user with physical access to the system can exploit this vulnerability to cause a denial of service (system crash) or possibly execute arbitrary code.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Install updates from vendor's website.
External links
- http://www.openwall.com/lists/oss-security/2019/08/20/2
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.10
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2a3f7221acddfe1caa9ff09b3a8158c39b2fdeac
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c2f870890fd28e023b0fcf49dcee333f2c8bad7
- https://syzkaller.appspot.com/bug?id=75903e0021cef79bc434d068b5169b599b2a46a9
- https://usn.ubuntu.com/4115-1/
- https://usn.ubuntu.com/4118-1/