CVE-2021-47311
kernel: net: qcom/emac: fix UAF in emac_remove
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 21, 2024
Updated · June 28, 2026
Description
A vulnerability was found in the Linux kernel's Qualcomm EMAC driver, where the emac_remove function can lead to a use-after-free issue when the driver tries to access data after the network device has been freed, causing instability and a crash in the network subsystem.
Statement
This vulnerability is rated as a moderate severity because the use-after-free can disrupt the network operations, leading to potential service interruptions, but it does not directly expose sensitive data; it may result in system instability.
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