CVE-2023-4273: Debian Linux

Medium severity, CVSS 6.7. EPSS: 0.7% chance of exploitation in the next 30 days.

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

• Debian Debian Linux: version 11.0 only; version 12.0 only
• Fedoraproject Fedora: version 37 only; version 38 only
• Linux Linux Kernel: before 6.4 (fixed in 6.4); version 6.5 only
• Netapp h300s Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Red Hat Enterprise Linux: version 9.0 only

Published 2023-08-09. Last modified 2026-06-17.