#VU88889 Out-of-bounds read in Linux kernel - CVE-2021-46955

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Main Vulnerability Database Vulnerabilities #VU88889

#VU88889 Out-of-bounds read in Linux kernel - CVE-2021-46955

Published: April 22, 2024 / Updated: May 14, 2025


Vulnerability identifier: #VU88889
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-46955
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the ovs_fragment() function in net/openvswitch/actions.c when running openvswitch on kernels built with KASAN. A remote attacker can send specially crafted IPv4 packets to the system, trigger an out-of-bounds read error and read contents of memory on the system or crash the kernel.


Remediation

Install updates from vendor's website.

External links