#VU64201 Incorrect calculation in Linux kernel - CVE-2021-31440

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Main Vulnerability Database Vulnerabilities #VU64201

#VU64201 Incorrect calculation in Linux kernel - CVE-2021-31440

Published: June 13, 2022


Vulnerability identifier: #VU64201
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-31440
CWE-ID: CWE-682
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 out-of-bounds access flaw in the Linux kernel’s implementation of the eBPF code verifier, where an incorrect register bounds calculation while checking unsigned 32-bit instructions in an eBPF program occurs. A local user can use this flaw to crash the system or possibly escalate their privileges on the system.


Remediation

Install updates from vendor's website.

External links