CVE-2020-26147
kernel: reassembling mixed encrypted/plaintext fragments
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 11, 2021
Updated · June 28, 2026
Description
A flaw was found in ieee80211_rx_h_defragment in net/mac80211/rx.c in the Linux Kernel's WiFi implementation. This vulnerability can be abused to inject packets or exfiltrate selected fragments when another device sends fragmented frames, and the WEP, CCMP, or GCMP data-confidentiality protocol is used. The highest threat from this vulnerability is to integrity.
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 does not 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 · 5.4CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
CVSS 3.1 · 4.8CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE-307 · Improper Restriction of Excessive Authentication Attempts