CVE-2021-47301
kernel: igb: Fix use-after-free error during reset
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 21, 2024
Updated · November 21, 2025
Description
A vulnerability was found in the Linux kernel's igb driver. During a reset operation, the driver could access memory that had already been freed. If the driver attempts to use this freed memory, it can lead to a system crash or instability because the memory may no longer be valid.
Statement
This vulnerability is rated as a Moderate severity because the issue primarily impacts system stability by potentially causing a crash if the driver interacts with freed memory. It does not expose sensitive information or allow unauthorized access.
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
Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
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-416 · Use After Free