CVE-2023-4692 @ morris

"CVE-2023-4692"
"grub2-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5"
"grub2-common-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5"
"grub2-efi-x64-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5"
"grub2-pc-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5"
"grub2-pc-modules-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5"
"grub2-tools-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5"
"Am I vulnerable?"

Status

fixed

Priority

9.0

Match score

4.0

Risk

RCE MemCorrupt

CVSS

7.5 HIGH

Reason

cpe: grub2; pkgs: grub2, grub2-common, grub2-efi-x64, grub2-pc, grub2-pc-modules, grub2-tools; version: in-range: grub2-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5, grub2-common-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5, grub2-efi-x64-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5, grub2-pc-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5, grub2-pc-modules-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5, grub2-tools-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5; risk:rce

Created

2026-08-02T16:53:21Z

Updated

2026-08-22T10:17:49Z

Closed

2026-08-02T19:25:02Z

Package interrogation (copy)

Run on the host — click to copy a command. RPM

Package	Commands
grub2-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5
grub2-common-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5
grub2-efi-x64-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5
grub2-pc-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5
grub2-pc-modules-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5
grub2-tools-2.02-0.87.el7_9.14.cloudlinux.1.tuxcare.els5

Inventory lookup

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

Suggestions: grub2 · grub2-common · grub2-efi-x64 · grub2-pc · grub2-pc-modules · grub2-tools

Related CVE (same fix)

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

Host OS / kernel

CloudLinux release 7.9 (Boris Yegorov) (7.9) · cloudlinux

Arch

x86_64

kernel_release

uname -r → 3.10.0-962.3.2.lve1.5.89.el7.x86_64

kernel_version

uname -v → #1 SMP Thu Jul 9 15:55:31 UTC 2026

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
mufasa	fixed	9.0	2026-08-22T10:17:49Z	Open
Library	accepted_risk	3.75	2026-08-22T10:17:49Z	Open
Archive	accepted_risk	2.62	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

No, you are not vulnerable.

TuxCare released the fix for this CVE in the els5 rebuild of exactly this version:

Advisory: CLSA-2026:1779219098
Fixed packages: grub2-2.02-0.87.el7_9.14.tuxcare.els5 (and the corresponding CloudLinux-branded packages)

Installed packages match the fixed version.

Update status

Add note only

Mitigation log

2026-08-02T19:25:02Z — fixed

No, you are not vulnerable. TuxCare released the fix for this CVE in the els5 rebuild of exactly this version: Advisory: CLSA-2026:1779219098 Fixed packages: grub2-2.02-0.87.el7_9.14.tuxcare.els5 (and the corresponding CloudLinux-branded packages) Installed packages match the fixed version.

References

NVD: CVE-2023-4692