CVE-2023-4273

MEDIUMNVD 6.76.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.7 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 52% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Elevated
6.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.7Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
6.7
EG Score
6.7(medium)
EG Risk
—
EPSS
47.9%
KEV
Not listed

Published

August 9, 2023

Last Modified

June 17, 2026

References (14)

Vendor Advisories for CVE-2023-4273(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-22.04c (6.1.0.1021.21) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oem-22.04b (6.0.0.1021.21) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.2.0.34.34) @ lunar2026-05-24ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1043.43) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.86.96~20.04.44) @ focal2026-05-24ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1040.38) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.86.83) @ jammy2026-05-24ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.2.0.1011.13) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1043.49~20.04.33) @ focal2026-05-24ubuntu
redhatkernel-0:5.14.0-362.8.1.el9_32023-11-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 105 total refreshes for this CVE.

  1. 2026-07-22 23:13 UTCEG score recompute▲ 0.70
  2. 2026-07-22 14:06 UTCEPSS rescore
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  14. 2026-07-15 12:49 UTCOSV refresh
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  22. 2026-06-24 06:20 UTCNVD updateCVSS v3 → 6.7
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Frequently asked(5)

What is CVE-2023-4273?
CVE-2023-4273 is a medium vulnerability published on August 9, 2023. 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…
When was CVE-2023-4273 disclosed?
CVE-2023-4273 was first published in the National Vulnerability Database on August 9, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-4273 actively exploited?
CVE-2023-4273 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-4273?
CVE-2023-4273 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2023-4273?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-4273, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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