CVE-2021-47302
kernel: igc: 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 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 · 5.2CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H
CWE-416 · Use After Free