What’s Vulnerable › Vulnerabilities

CVE-2026-98890: wifi: libertas: reject short monitor TX frames

• 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: 2026-10-23 · updated 2026-10-26

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: reject short monitor TX frames In monitor mode, lbs_hard_start_xmit() casts skb->data to a radiotap TX header, skips that header, and then copies the 802.11 destination address from offset 4 in the remaining frame. The generic length check only rejects zero-length and oversized skbs, so a short monitor frame can be read past the end of the skb data. Require enough bytes for the radiotap TX header and the destination address field before using the monitor-mode header layout.

Affected products

• Linux kernel: before 5.10.271; before 5.15.222; before 6.1.189; before 6.6.158; before 6.12.111; before 6.18.53 — fixed in 5.10.271, 5.15.222, 6.1.189, 6.12.111, 6.18.53, 6.6.158

How to fix

Upgrade to a fixed version: Linux kernel 5.10.271, 5.15.222, 6.1.189, 6.12.111. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/13ff543e0b2c713aedeaadadde686686e949dc78
• https://git.kernel.org/stable/c/443fac3de65c76544b450b9f9903be8989150d55
• https://git.kernel.org/stable/c/6576baa3fdbaa91fa75e4ba27095f4b8a27349a8
• https://git.kernel.org/stable/c/68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c
• https://git.kernel.org/stable/c/b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb
• https://git.kernel.org/stable/c/cdcfd662c67833d89ee3d912efde2eb67c8a7326
• https://git.kernel.org/stable/c/d865dd6de8295f2bfaa83f0f5d49d2bef1543065

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