Unscored severity · published Oct 23, 2026
CVE-2026-98891
wifi: mac80211: validate deauth frame length before reason access
New
–
CVSS
0.2%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: validate deauth frame length before reason access
ieee80211_rx_mgmt_deauth() reads the deauth reason code before checking
that the fixed field is actually present in the received frame.
Validate the deauth frame length first and only then read the reason
code.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
c9c99f8938e41b878802d5d8481d6f7a212515b0 before 51092dc769f021e9634474e1bd5a561da477fbdb; c9c99f8938e41b878802d5d8481d6f7a212515b0 before a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e; c9c99f8938e41b878802d5d8481d6f7a212515b0 before 80d1a110e9096b5bf41497f6b151154084862385; c9c99f8938e41b878802d5d8481d6f7a212515b0 before a78689e2beed200d4590318612c74ae25c9408cf; c9c99f8938e41b878802d5d8481d6f7a212515b0 before 7a5ef1fd654d0e90d59aa32c881789c8bcc4125a; c9c99f8938e41b878802d5d8481d6f7a212515b0 before 9df64ad43e1f2c036667bba2bf385e9d7b3af564; +2 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98891
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-98891
git.kernel.org
https://git.kernel.org/stable/c/4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f
git.kernel.org
https://git.kernel.org/stable/c/51092dc769f021e9634474e1bd5a561da477fbdb
git.kernel.org
https://git.kernel.org/stable/c/7a5ef1fd654d0e90d59aa32c881789c8bcc4125a
git.kernel.org
https://git.kernel.org/stable/c/80d1a110e9096b5bf41497f6b151154084862385
git.kernel.org
https://git.kernel.org/stable/c/9df64ad43e1f2c036667bba2bf385e9d7b3af564
git.kernel.org
https://git.kernel.org/stable/c/a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e
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