Not yet scoredPublished Oct 23, 2026

CVE-2026-98891wifi: mac80211: validate deauth frame length before reason access

Updated under an hour ago (Oct 28, 2026, 5:40 AM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from c9c99f8938e41b878802d5d8481d6f7a212515b0 before 51092dc769f021e9634474e1bd5a561da477fbdb; from c9c99f8938e41b878802d5d8481d6f7a212515b0 before a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e; from c9c99f8938e41b878802d5d8481d6f7a212515b0 before 80d1a110e9096b5bf41497f6b151154084862385; from c9c99f8938e41b878802d5d8481d6f7a212515b0 before a78689e2beed200d4590318612c74ae25c9408cf; from c9c99f8938e41b878802d5d8481d6f7a212515b0 before 7a5ef1fd654d0e90d59aa32c881789c8bcc4125a; from c9c99f8938e41b878802d5d8481d6f7a212515b0 before 9df64ad43e1f2c036667bba2bf385e9d7b3af564; from c9c99f8938e41b878802d5d8481d6f7a212515b0 before 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f	CNA record

References

References

https://git.kernel.org/stable/c/51092dc769f021e9634474e1bd5a561da477fbdb
https://git.kernel.org/stable/c/a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e
https://git.kernel.org/stable/c/80d1a110e9096b5bf41497f6b151154084862385
https://git.kernel.org/stable/c/a78689e2beed200d4590318612c74ae25c9408cf
https://git.kernel.org/stable/c/7a5ef1fd654d0e90d59aa32c881789c8bcc4125a
https://git.kernel.org/stable/c/9df64ad43e1f2c036667bba2bf385e9d7b3af564
https://git.kernel.org/stable/c/4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.