HOMEVULNERABILITIESCVE-2023-4273
MEDIUM

CVE-2023-4273

CWE-121Published: August 9, 2023· Updated: Jun 17, 2026

6.7
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-4273 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.7.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
Linux1 product(s)
linux kernel
netapp8 product(s)
h300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh410s firmwareh410s
Red Hat1 product(s)
enterprise linux
Source: NVD CPE · 15 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=2221609
PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=2221609
ADVISORYhttps://access.redhat.com/security/cve/CVE-2023-4273
ADVISORYhttps://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/
ADVISORYhttps://access.redhat.com/security/cve/CVE-2023-4273
ADVISORYhttps://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/

All References (14)

→
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/[email protected]/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/
→
https://lists.fedoraproject.org/archives/list/[email protected]/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

Quick Facts

CVE IDCVE-2023-4273
CVSS Score6.7 / 10
SeverityMEDIUM
WeaknessCWE-121
CISA KEVNo
Affected5 vendor(s)
PublishedAug 9, 2023

Related CVEs (CWE-121)

CVE-2026-42996
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CVE-2026-12485
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CVE-2020-14498
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CVE-2026-12847
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CVE-2014-9190
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CVE-2026-12848
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-4273 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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