boxscore/security
CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2023-4693MEDIUM
Red Hat Red Hat Enterprise Linux 8 — Grub2: out-of-bounds read at fs/ntfs.c
  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   P   L   N   N  U  H  N  N    4.6   .0050   40.5     —
AFFECTED
  Product                     Versions     Fixed
  Red Hat Enterprise Linux 8  unspecified  1:2.02-156.el8
  Red Hat Enterprise Linux 9  unspecified  1:2.06-77.el9
  Red Hat Enterprise Linux 7  unspecified  —
TIMELINE
  Aug 31  Reserved by redhat
  Oct 25  Published (CNA: redhat)
  Jul 21  EXPLOIT PUBLISHED — CVE-2023-4693 (Red Hat Enterprise Linux 8). Public exploit reference added.
  Jul 21  RESCORED — CVE-2023-4693 (Red Hat Enterprise Linux 8). CVSS 5.3 → 4.6 (NVD).
CWE-125 · CNA: redhat · CVSS v3.1 · 13 references · NVD status: Modified

Description

An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.

Lifecycle

Complete event history — 4 events, chronological
DateEventDetail
August 31, 2023ReservedReserved by redhat
October 25, 2023PublishedPublished (CNA: redhat)
July 21, 2026EXPLOIT PUBLISHEDEXPLOIT PUBLISHED — CVE-2023-4693 (Red Hat Enterprise Linux 8). Public exploit reference added.
July 21, 2026RESCOREDRESCORED — CVE-2023-4693 (Red Hat Enterprise Linux 8). CVSS 5.3 → 4.6 (NVD).

Affected

Affected products and packages — 3 rows
VendorProduct / PackageEcosystemVersion introducedFixed
Red HatRed Hat Enterprise Linux 8——1:2.02-156.el8
Red HatRed Hat Enterprise Linux 9——1:2.06-77.el9
Red HatRed Hat Enterprise Linux 7———

Weaknesses

CWE-125

References (13)

Related

Authoritative record: CVE-2023-4693 at cve.org

Vendors: red hat

Weaknesses: CWE-125

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-4693 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.