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.
Affected products
linux: linux kernel; fedoraproject: fedora; redhat: enterprise linux; debian: debian linux; netapp: h300s firmware; netapp: h300s; netapp: h500s firmware; netapp: h500s; netapp: h700s firmware; netapp: h700s; netapp: h410s firmware; netapp: h410s
References10
- bugzilla.redhat.com/show_bug.cgi?id=2221609 Issue TrackingPatchThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2221609 Issue TrackingPatchThird Party Advisory
- dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-e… ExploitThird Party Advisory
- dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-e… ExploitThird Party Advisory
- access.redhat.com/errata/RHSA-2023:6583
- access.redhat.com/security/cve/CVE-2023-4273 Third Party Advisory
- access.redhat.com/errata/RHSA-2023:6583
- access.redhat.com/security/cve/CVE-2023-4273 Third Party Advisory
- lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- lists.fedoraproject.org/archives/list/[email protected]…
Metrics
- CVSS 3.1
-
6.7
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 51 · as of 5 November 2026
- CWE
- CWE-121CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.