CVE-2021-47306
kernel: net: fddi: fix UAF in fza_probe
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 fza_probe function in the Linux kernel's FDDI driver. Private data might be used after it has been freed, leading to an use-after-free issue, causing system instability or crashes if the freed data is accessed.
Statement
This vulnerability is rated as a moderate because this issue does not directly expose sensitive information. No Red Hat products are affected.
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