CVE-2023-4273
Kernel: exfat: stack overflow in exfat_get_uniname_from_ext_entry
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Red Hat Enterprise Linux 9 Red Hat kernel
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:5.14.0-362.8.1.el9_3; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat kernel
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat kernel
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat kernel-rt
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat kernel
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat kernel-rt
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat kernel-rt
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Siemens |
≥ 0; < V1.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.0 medium |
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N | CNA: redhat |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/errata/RHSA-2023:6583CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-4273CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2221609CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/CNA: redhat
- https://access.redhat.com/errata/RHSA-2023:6583ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
- https://access.redhat.com/security/cve/CVE-2023-4273ADP: CVE · vdb-entry, x_refsource_REDHAT, x_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=2221609ADP: CVE · issue-tracking, x_refsource_REDHAT, x_transferred
- https://dfir.ru/2023/08/23/cve-2023-4273-a-vulnerability-in-the-linux-exfat-driver/ADP: CVE · x_transferred
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlADP: CVE · x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/ADP: CVE · x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/ADP: CVE · x_transferred
- https://security.netapp.com/advisory/ntap-20231027-0002/ADP: CVE · x_transferred
- https://www.debian.org/security/2023/dsa-5480ADP: CVE · x_transferred
- https://www.debian.org/security/2023/dsa-5492ADP: CVE · x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-831302.htmlADP: siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-794697.htmlADP: siemens-SADP
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.