CVE-2023-4692
HIGH7.8EPSS 0.00%grub2 - security update
Published: 10/25/2023Modified: 4/28/2026
Description
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
Affected packages (3)
- Debian/grub2from 0, < 2.06-3~deb11u6
- Debian/grub2from 0, < 2.06-3~deb10u4
- Debian/grub2from 0, < 2.06-3~deb11u6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |