Linux kernel: libertas wifi monitor mode TX frame buffer over-read
CVE-2026-98890 Published on October 23, 2026
wifi: libertas: reject short monitor TX frames
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.
Products Associated with CVE-2026-98890
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Affected Versions
Linux:- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below d865dd6de8295f2bfaa83f0f5d49d2bef1543065 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 6576baa3fdbaa91fa75e4ba27095f4b8a27349a8 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 443fac3de65c76544b450b9f9903be8989150d55 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below cdcfd662c67833d89ee3d912efde2eb67c8a7326 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 13ff543e0b2c713aedeaadadde686686e949dc78 is affected.
- Version 2.6.22 is affected.
- Before 2.6.22 is unaffected.
- Version 5.10.271, <= 5.10.* is unaffected.
- Version 5.15.222, <= 5.15.* is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.111, <= 6.12.* is unaffected.
- Version 6.18.53, <= 6.18.* is unaffected.
- Version 7.2, <= * is unaffected.