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

CVE-2023-4273

CVE-2023-4273MEDIUM

Red Hat Red Hat Enterprise Linux 9 — Kernel: exfat: stack overflow in exfat_get_uniname_from_ext_entry

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   H   N  U  H  H  H    6.7   .0065   50.3     —

AFFECTED
  Product                     Versions     Fixed
  Red Hat Enterprise Linux 9  unspecified  0:5.14.0-362.8.1.el9_3
  Red Hat Enterprise Linux 9  unspecified  0:5.14.0-362.8.1.el9_3
  Red Hat Enterprise Linux 6  unspecified  —
  Red Hat Enterprise Linux 7  unspecified  —
  Red Hat Enterprise Linux 7  unspecified  —
  Red Hat Enterprise Linux 8  unspecified  —
  Red Hat Enterprise Linux 8  unspecified  —
  Red Hat Enterprise Linux 9  unspecified  —

TIMELINE
  Aug 9   Reserved by redhat
  Aug 9   Published (CNA: redhat)
  Oct 14  EXPLOIT PUBLISHED — CVE-2023-4273 (Red Hat Enterprise Linux 9). Public exploit reference added.
  Oct 14  RESCORED — CVE-2023-4273 (Red Hat Enterprise Linux 9). CVSS 6 → 6.7 (NVD).

CWE-787, CWE-121 · CNA: redhat · CVSS v3.1 · 12 references · NVD status: Modified

Description

A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation of the file name reconstruction function, which is responsible for reading file name entries from a directory index and merging file name parts belonging to one file into a single long file name. Since the file name characters are copied into a stack variable, a local privileged attacker could use this flaw to overflow the kernel stack.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
August 9, 2023	Reserved	Reserved by redhat
August 9, 2023	Published	Published (CNA: redhat)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2023-4273 (Red Hat Enterprise Linux 9). Public exploit reference added.
October 14, 2026	RESCORED	RESCORED — CVE-2023-4273 (Red Hat Enterprise Linux 9). CVSS 6 → 6.7 (NVD).

Affected

Affected products and packages — 8 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat Enterprise Linux 9	—	—	0:5.14.0-362.8.1.el9_3
Red Hat	Red Hat Enterprise Linux 9	—	—	0:5.14.0-362.8.1.el9_3
Red Hat	Red Hat Enterprise Linux 6	—	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—	—

Weaknesses

CWE-787 · CWE-121

References (12)

Authoritative record: CVE-2023-4273 at cve.org

Vendors: red hat

Weaknesses: CWE-787 · CWE-121

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-4273 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 Monday, October 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.