VulnerabilityPublished 23 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98890· Medium

Not known to be exploited · fixed in d865dd6de8295f2bfaa83f0f5d49d2bef1543065 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in d865dd6de8295f2bfaa83f0f5d49d2bef1543065, cdcfd662c67833d89ee3d912efde2eb67c8a7326, b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb +4

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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-65v2-4hr3-h5j6

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < d865dd6de8295f2bfaa83f0f5d49d2bef1543065	Fixed in d865dd6de8295f2bfaa83f0f5d49d2bef1543065
LinuxLinux	Affected ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < cdcfd662c67833d89ee3d912efde2eb67c8a7326	Fixed in cdcfd662c67833d89ee3d912efde2eb67c8a7326
LinuxLinux	Affected ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb	Fixed in b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb
LinuxLinux	Affected ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 6576baa3fdbaa91fa75e4ba27095f4b8a27349a8	Fixed in 6576baa3fdbaa91fa75e4ba27095f4b8a27349a8
LinuxLinux	Affected ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 443fac3de65c76544b450b9f9903be8989150d55	Fixed in 443fac3de65c76544b450b9f9903be8989150d55
LinuxLinux	Affected ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c	Fixed in 68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c

AI-suggested

A fix has been implemented in the Linux kernel to reject short monitor TX frames by requiring sufficient length before accessing the radiotap TX header and destination address. Users should apply the official kernel update containing this fix once available. Patch status is not explicitly confirmed in the provided data; check the vendor advisory or Linux kernel mailing lists for the official patch and update guidance.

Description

A vulnerability in the Linux kernel's libertas wifi driver was resolved that involved improper handling of short monitor mode TX frames. The function lbs_hard_start_xmit() incorrectly processes frames by casting data to a radiotap TX header and copying the 802.11 destination address without sufficient length checks, potentially causing out-of-bounds reads. The fix requires verifying that the frame has enough bytes for the radiotap TX header and destination address before accessing them.

References

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