Riskcovery

CVE-2023-4692

Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution

State
Published
Severity
7.5 High
Published
Oct 25, 2023
Updated
Jul 21, 2026
Reserved
Aug 31, 2023

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hredhat

Weaknesses

Affected Products

ProductVersions
grub
  • 2.12 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 1:2.02-156.el8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 1:2.06-77.el9 and laterNot affected
Red Hat Enterprise Linux 7Red Hat

    References

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