Answer in brief
CVE-2023-4692 records a High severity (CVSS 7.5) vulnerability in Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution. The current sources do not mark it as known exploited. The current feed maps Red Hat/grub2 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Red Hat/grub2 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/grub2generic | * | Not reported |
Published upstream
Oct 25, 2023
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.