CVE-2021-33098
kernel: Improper input validation in the Intel(R) Ethernet ixgbe driver may allow an authenticated user to potentially enable DoS via local access
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · November 9, 2021
Updated · November 22, 2025
Description
A flaw was found in the Linux kernel. This flaw allows an attacker who can modify the MTU of a virtualized PCIe device (in a guest, for example) to crash the host system’s kernel if they set the MTU of the VF device to an unsupported value.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options does not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-20 · Improper Input Validation