CVE-2026-98890: Linux kernel · wifi: libertas: reject short monitor TX frames
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:29 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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.
References
- ubuntu.com/security/CVE-2026-98890 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98890 (opens in a new tab)
- git.kernel.org/stable/c/13ff543e0b2c713aedeaadadde686686e949dc78 (opens in a new tab)
- git.kernel.org/stable/c/443fac3de65c76544b450b9f9903be8989150d55 (opens in a new tab)
- git.kernel.org/stable/c/6576baa3fdbaa91fa75e4ba27095f4b8a27349a8 (opens in a new tab)
- git.kernel.org/stable/c/68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c (opens in a new tab)
- git.kernel.org/stable/c/b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb (opens in a new tab)
- git.kernel.org/stable/c/cdcfd662c67833d89ee3d912efde2eb67c8a7326 (opens in a new tab)
- git.kernel.org/stable/c/d865dd6de8295f2bfaa83f0f5d49d2bef1543065 (opens in a new tab)