#VU76098 Out-of-bounds write in Linux kernel - CVE-2023-31436 

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Main Vulnerability Database Vulnerabilities #VU76098

#VU76098 Out-of-bounds write in Linux kernel - CVE-2023-31436

Published: May 14, 2023 / Updated: June 16, 2024


Vulnerability identifier: #VU76098
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-31436
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the qfq_change_class() function in net/sched/sch_qfq.c when handling the MTU value provided to the QFQ Scheduler. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.


Remediation

Install updates from vendor's website.

External links