{"id":"CVE-2021-38206","title":"The mac80211 subsystem in the Linux kernel before 5.12.13, when a device supporting only 5 GHz is used, allows attackers to cause a denial of service (NULL pointer dereference in the radiotap parser) by injecting a frame with 802.11a rates.","summary":"The mac80211 subsystem in the Linux kernel before 5.12.13, when a device supporting only 5 GHz is used, allows attackers to cause a denial of service (NULL pointer dereference in the radiotap parser) by injecting a frame with 802.11a rates.","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 5.12.13"],"patched":["linux_kernel 5.12.13"],"published":"2021-08-08","updated":"2026-10-08","sourceUpdated":"2026-10-08T21:17:39.517","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-38206","references":[{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13","label":"cve@mitre.org"},{"url":"https://github.com/torvalds/linux/commit/bddc0c411a45d3718ac535a070f349be8eca8d48","label":"cve@mitre.org"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/torvalds/linux/commit/bddc0c411a45d3718ac535a070f349be8eca8d48","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00269,"epssPercentile":0.17439,"ingestedAt":"2026-10-08T22:11:53.740Z","slug":"CVE-2021-38206","body":"## Overview\n\nThe mac80211 subsystem in the Linux kernel before 5.12.13, when a device supporting only 5 GHz is used, allows attackers to cause a denial of service (NULL pointer dereference in the radiotap parser) by injecting a frame with 802.11a rates.\n\n## Affected\n\n- `linux_kernel < 5.12.13`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.12.13`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}