Zero-day vulnerability in Valhall GPU Kernel Driver

Memory leak
CVE-2023-26083

Not patched

The vulnerability was used as part of exploitation chain against Samsung Internet Browser and targeted victims in December 2022 with one-time links sent via SMS to devices located in the United Arab Emirates (UAE).

Vulnerability details

Advisory: SB2023033049 - Information disclosure in ARM Mali GPU kernel drivers

Vulnerable component: Valhall GPU Kernel Driver

CVE-ID: CVE-2023-26083

CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:H/RL:O/RC:C

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Description:

The vulnerability allows a local application to gain access to sensitive information.

The vulnerability exists due memory leak. A local application can force the driver to leak memory and gain access to sensitive information.

Note, this vulnerability is being actively exploited in the wild.

External links:

https://blog.google/threat-analysis-group/spyware-vendors-use-0-days-and-n-days-against-popular-platforms/

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.