CVE-2023-3161 Integer overflow in Linux Kernel (fbcon)
A local attacker can cause a denial of service in the Linux Kernel by providing large font dimensions to the Framebuffer Console, triggering an out-of-bounds shift.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-3161?
CVE-2023-3161 is a medium-severity vulnerability in Fedoraproject Fedora, published on 12 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font->width and font->height greater than 32 to fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs leading to undefined behavior and possible denial of service.
Which versions are affected by CVE-2023-3161?
It affects 3 products.
Products include Fedoraproject Fedora, Linux kernel, Redhat Enterprise Linux.
How do I fix CVE-2023-3161?
Apply the vendor's patch.
Is CVE-2023-3161 being exploited?
There is no known exploitation of CVE-2023-3161 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as AZL-27192, DEBIAN-CVE-2023-3161, GHSA-hx96-88f5-c8jv, UBUNTU-CVE-2023-3161.