Vulnerability identifier: #VU69395

Vulnerability risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3775

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
grub
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

The vulnerability allows an attacker to crash the system.

The vulnerability exists due to a boundary error when rendering certain unicode sequences in grub2 font code. An attacker with physical access to device can trigger an out-of-bounds write and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

grub: 2.00 - 2.06

---

External links
http://bugzilla.redhat.com/show_bug.cgi?id=2138880

---

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.