CVE-2023-4273

Name: CVE-2023-4273
Creator: NVD / NIST
Published: 2023-08-09T15:15:09.823+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2023-4273 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.66%

47.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	< 6.4	—
Linux	Linux Kernel	6.5	Rc1
Fedoraproject	Fedora	37	—
Fedoraproject	Fedora	38	—
Redhat	Enterprise Linux	9.0	—
Debian	Debian Linux	11.0	—
Debian	Debian Linux	12.0	—
Netapp	H300s Firmware	All versions	—
Netapp	H500s Firmware	All versions	—
Netapp	H700s Firmware	All versions	—
Netapp	H410s Firmware	All versions	—

References

https://access.redhat.com/errata/RHSA-2023:6583
https://access.redhat.com/security/cve/CVE-2023-4273Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2221609Issue Tracking, Patch, Third Party Advisory
https://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/Exploit, Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:6583
https://access.redhat.com/security/cve/CVE-2023-4273Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2221609Issue Tracking, Patch, Third Party Advisory
https://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/
https://security.netapp.com/advisory/ntap-20231027-0002/
https://www.debian.org/security/2023/dsa-5480
https://www.debian.org/security/2023/dsa-5492

Timeline

Published: Aug 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4273?

How severe is CVE-2023-4273?

CVE-2023-4273 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4273?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4273?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST