Linux Kernel vmwgfx Driver Double Free Local Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the handling of vmw_buffer_object objects. The issue results from the lack of validating the existence of an object prior to performing further free operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.
Additional Details
Linux has issued an update to correct this vulnerability. More details can be found at:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c?h=v6.4-rc1&id=9ef8d83e8e25d5f1811b3a38eb1484f85f64296c
Disclosure Timeline
- 2023-02-08 - Vulnerability reported to vendor
- 2023-05-17 - Coordinated public release of advisory
- 2023-05-26 - Advisory Updated
Credit
Anonymous
