CVE-2026-98193: wifi: libipw: reject TKIP frames without a full MIC

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-06 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: libipw: reject TKIP frames without a full MIC libipw_michael_mic_verify() assumes that an skb contains an eight-byte Michael MIC. A short TKIP frame makes the unsigned payload length wrap, causing michael_mic() to read past the skb. Check that the MIC is present before verifying it, and use the existing MICHAEL_MIC_LEN constant for all MIC lengths in the verifier.

Affected products

Linux: 2.6.14 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0636970f31dd9099f98578a62335eb534be72e3a
https://git.kernel.org/stable/c/06f42accaf3c6aecab1dcc57f68dde6c06c8b380
https://git.kernel.org/stable/c/2e23abdaf6d32aa112efaa474629af7584d3acc6
https://git.kernel.org/stable/c/9442bf5ea83314ef9a8a33e6885da45a61d1474d
https://git.kernel.org/stable/c/9a7fb67364817710c96785ff86b71a2711ee92cb
https://git.kernel.org/stable/c/ac7c08626f67844336086cf563f417566b76f0d7
https://git.kernel.org/stable/c/bb7ae8910cc886885aea95abb7c2e578a2341646
https://git.kernel.org/stable/c/f448b267968d0ee985e5927c868c8f858169ab34

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