CVE-2023-4692 @ Archive

"CVE-2023-4692"
"grub2-common-2.06-3~deb10u4"
"grub2"
"Am I vulnerable?"

Status

accepted_risk

Priority

2.62

Match score

4.0

Risk

RCE MemCorrupt

CVSS

7.5 HIGH

Reason

cpe: grub2; pkgs: grub2-common; version: in-range: grub2-common-2.06-3~deb10u4; risk:rce

Created

2026-08-03T20:10:52Z

Updated

2026-08-22T10:17:49Z

Closed

2026-08-03T20:25:59Z

Package interrogation (copy)

Run on the host — click to copy a command. Debian/apt

Package	Commands
grub2-common-2.06-3~deb10u4
grub2

Inventory lookup

Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.

Suggestions: grub2-common · grub2

System	Matches	Ticket for CVE-2023-4692
Archive	grub2-common 2.06-3~deb10u4	accepted_risk open
Janus	grub2-common 2.06-3~deb10u4	accepted_risk open
Library	grub2-common 2.02~beta3-5+deb9u2	accepted_risk open
Saiph	grub2-common 2.06-3~deb10u4	accepted_risk open
morris	grub2-common 2.02	fixed open
mufasa	grub2-common 2.02	fixed open
Bullseye	grub2-common 2.06-3~deb11u7	none
Matrix	grub2-common 2.06-13+deb12u2	none
Silk	grub2-common 2.06-13+deb12u2	none

Related CVE (same fix)

Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.

Host OS / kernel

Debian GNU/Linux 10 (buster) (10) · debian

Arch

x86_64

kernel_release

uname -r → 5.10.0-25-amd64

kernel_version

uname -v → #1 SMP Debian 5.10.191-1 (2023-08-16)

For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.

Same CVE on other hosts

Open the ticket for this CVE on another system.

System	Status	Priority	Updated
morris	fixed	9.0	2026-08-22T10:17:49Z	Open
mufasa	fixed	9.0	2026-08-22T10:17:49Z	Open
Library	accepted_risk	3.75	2026-08-22T10:17:49Z	Open
Janus	accepted_risk	2.62	2026-08-22T10:17:49Z	Open
Saiph	accepted_risk	2.62	2026-08-22T10:17:49Z	Open

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.

Determination

Issue: Out-of-bounds write (heap overflow) in GRUB2’s NTFS filesystem driver.
Impact: An attacker who can present a specially crafted NTFS filesystem image to GRUB can corrupt heap metadata. In some cases this can lead to arbitrary code execution in the boot environment and Secure Boot bypass.
Attack requirements: Local access to control the boot media (e.g. USB, external drive, or in some network boot scenarios).
Risk : Extremely low

Update status

Add note only

Mitigation log

2026-08-03T20:24:56Z — affects

Issue: Out-of-bounds write (heap overflow) in GRUB2’s NTFS filesystem driver. Impact: An attacker who can present a specially crafted NTFS filesystem image to GRUB can corrupt heap metadata. In some cases this can lead to arbitrary code execution in the boot environment and Secure Boot bypass. Attack requirements: Local access to control the boot media (e.g. USB, external drive, or in some network boot scenarios).

2026-08-03T20:25:25Z

Requires Physical Access to machine and NTFS boot media.

2026-08-03T20:25:59Z — accepted_risk

Risk : Extremely low

References

NVD: CVE-2023-4692