CVE-2021-47395
kernel: mac80211: limit injected vht mcs/nss in ieee80211_parse_tx_radiotap
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 21, 2024
Updated · September 28, 2026
Description
A flaw was found in the Linux kernel's mac80211 wireless subsystem. When processing injected radiotap packet headers, the kernel fails to properly validate Very High Throughput (VHT) Modulation and Coding Scheme (MCS) and spatial stream rate parameters. A local attacker can exploit this flaw by transmitting specially crafted packets with out-of-range values, triggering kernel warnings or crashing the system, leading to a Denial of Service (DoS).
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
No mitigation is specified in collected source.
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-20 · Improper Input Validation