Use-after-free in Linux kernel

1) Use-after-free

EUVDB-ID: #VU28417

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-19769

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local privileged user to execute arbitrary code.

In the Linux kernel 5.3.10, there is a use-after-free (read) in the perf_trace_lock_acquire function (related to include/trace/events/lock.h).

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.0 - 5.5.19

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.8:*:*:*:*:*:*:*

External links

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.28
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.12
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.