CVE-2023-4273
Kernel: exfat: stack overflow in exfat_get_uniname_from_ext_entry
CVSS Score
6.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-121 |
| Vendor | red hat |
| Product | red hat enterprise linux 9 |
| Published | Aug 9, 2023 |
| Last Updated | Nov 14, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2023:6583 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-4273 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2221609 dfir.ru: https://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/ lists.debian.org: https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/ security.netapp.com: https://security.netapp.com/advisory/ntap-20231027-0002/ debian.org: https://www.debian.org/security/2023/dsa-5480 debian.org: https://www.debian.org/security/2023/dsa-5492
Credits
Red Hat would like to thank Maxim Suhanov for reporting this issue.