#VU78528 Double free in Linux kernel - CVE-2023-33952

Vulnerability identifier: #VU78528

Vulnerability 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-2023-33952

CWE-ID: CWE-415

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to a boundary error when handling vmw_buffer_object objects within the vmw_user_bo_lookup() function in drivers/gpu/drm/vmwgfx/vmwgfx_bo.c. A local user can trigger a double free error and execute arbitrary code on the target system with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://www.zerodayinitiative.com/advisories/ZDI-23-708/
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

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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.