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CVE-2021-47302

kernel: igc: Fix use-after-free error during reset

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Severity

Moderate

Red Hat Product Security

5.2

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 Intel Gigabit Ethernet driver. This issue occurs in the igc_poll function, where a piece of memory is accessed after it has been freed during a reset operation. This could lead to invalid memory access, causing potential system crashes if the driver tries to use or free the already-deleted memory.

Statement

This vulnerability is classified as moderate severity because it affects system stability, which could lead to crashes or degraded performance, but 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 · 5.2
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H

CWE-416 · Use After Free