Use-after-free in Linux kernel - CVE-2019-15214
Published: September 3, 2019
Vulnerability identifier: #VU20815
CSH Severity: Low
CVSS v4.0: 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
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability 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.
How to mitigate CVE-2019-15214
Install updates from vendor's website.
Sources
- 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/