CVE-2023-4273

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.64% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 50.9% of scored records. A rank, not a probability.

NVD base score

6.7 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-08-09 14:53Z3 YR AGO

Last updated

2026-10-14 21:50Z14 DAYS AGO

Reserved

2023-08-09

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 6.0)

CNA CVSS vector

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

Weaknesses

• CWE-121Stack-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

ec3f9daf31a86eba9b3337cc35c5bccefa7f0bfe117d8d2cffddbd02636104ad

• access.redhat.comRHSA-2023:6583https://access.redhat.com/errata/RHSA-2023:6583vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4273vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2221609https://bugzilla.redhat.com/show_bug.cgi?id=2221609issue-trackingx_refsource_REDHAT
• dfir.ruhttps://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20231027-0002/
• www.debian.orghttps://www.debian.org/security/2023/dsa-5480
• www.debian.orghttps://www.debian.org/security/2023/dsa-5492
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-831302.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-794697.html