#VU65833 Out-of-bounds write in Linux kernel


Published: 2022-07-27

Vulnerability identifier: #VU65833

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-33655

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

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

Vendor:

Description

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

The vulnerability exists due to a boundary error in FBIOPUT_VSCREENINFO IOCTL. A local user can trigger an out-of-bounds write error and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions


External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4
http://www.openwall.com/lists/oss-security/2022/07/19/2
http://www.debian.org/security/2022/dsa-5191


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability