Use-after-free in Linux kernel - CVE-2019-15220

Vulnerability identifier: #VU20893

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-2019-15220

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to use-after-free error in the drivers/net/wireless/intersil/p54/p54usb.c driver. A local user can use a malicious USB device to trigger use-after-free error and execute arbitrary code on the system with elevated privileges.

Linux kernel
Slackware Linux
linux-4.4.217/kernel-generic
linux-4.4.217/kernel-huge
linux-4.4.217/kernel-modules
linux-4.4.217/kernel-headers
RSA Authentication Manager

Install update from vendor's website.

Linux kernel - update to 5.2.1
linux-4.4.217/kernel-generic - update to 4.4.217
linux-4.4.217/kernel-huge - update to 4.4.217
linux-4.4.217/kernel-modules - update to 4.4.217
linux-4.4.217/kernel-headers - update to 4.4.217_smp
RSA Authentication Manager - update to 8.4 Patch 9

• http://www.openwall.com/lists/oss-security/2019/08/20/2
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.1
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6e41e2257f1094acc37618bf6c856115374c6922
• https://syzkaller.appspot.com/bug?id=082c09653e43e33a6a56f8c57cf051eeacae9d5f
• https://usn.ubuntu.com/4115-1/
• https://usn.ubuntu.com/4118-1/

• Use-after-free in Linux kernel
• Slackware Linux update for kernel
• RSA Authentication Manager update for third-party components