CVE-2021-38206
kernel: NULL pointer dereference in the radiotap parser by injecting a frame with 802.11a rates in mac80211 subsystem
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 31, 2021
Updated · October 9, 2026
Description
A flaw was found on the Linux kernel. A NULL pointer dereference in the radiotap parser, leading to a denial of service, can occur in the mac80211 subsystem when a device supports only 5 GHz is used and frames with 802.11a rates are injected. The highest threat from this vulnerability is to system availability.
Statement
This issue only affects the Linux kernel versions as shipped with Red Hat Enterprise Linux 8.4 GA onwards. Previous Red Hat Enterprise Linux 8 kernel versions were not 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
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference