Advisory severityMedium6.0Red Hat Linux

Medium [CVE-2023-4273] Kernel: exfat: stack overflow in exfat_get_uniname_from_ext_entry

This medium-severity Red Hat Linux advisory covers CVE-2023-4273 affecting Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2023-4273 Source published Aug 9, 2023Source updated Jul 13, 2023

VulniPulse record published Oct 14, 2026

CVE-2023-4273

Affected products & platforms

Red Hat LinuxLinux Kernel

Open source advisory

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Summary

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. Red Hat Enterprise Linux 6, 7 and 8 are not affected by this flaw as they did not include exFAT filesystem support (introduced upstream in kernel v5.7).

Red Hat severity: Moderate — CVSS 6 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N). Weakness: CWE-121.

Red Hat fixing advisory: RHSA-2023:6583.

Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat package: kernel-rt.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 9 hours ago·verify at source

Fixed versions

kernel-0:5.14.0-362.8.1.el9_3
RHSA-2023:6583

Official advisory · high-confidence parse· fetched 9 hours ago·verify at source

Mitigation

Upgrade to a fixed release: kernel-0:5.14.0-362.8.1.el9_3, RHSA-2023:6583. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 9 hours ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Red Hat Security Data APIofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://access.redhat.com/hydra/rest/securitydata/cve.json; this link opens the Red Hat Linux advisory index instead of the raw feed document.
Red Hat Linux
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Red Hat Linux
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2023-4273NVD CVE.org MITRE

Discussion(0)

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