CVE-2026-98193

Kernel panic via short TKIP MIC underflow

Published Oct 6, 2026 · Updated Oct 6, 2026

An out-of-bounds read in Linux libipw TKIP verification allows context-dependent attackers to crash or stall a kernel via short wireless frames. The libipw_michael_mic_verify() function subtracts an absent eight-byte Michael MIC from an unsigned frame length, causing michael_mic() to read beyond the packet buffer. Exploitation requires an affected ipw2100 or ipw2200 device using host TKIP verification, an active TKIP key, and a sender able to supply a non-replayed frame with a valid encrypted integrity check.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in Linux libipw TKIP verification allows context-dependent attackers to crash or stall a kernel via short wireless frames. The libipw_michael_mic_verify() function subtracts an absent eight-byte Michael MIC from an unsigned frame length, causing michael_mic() to read beyond the packet buffer. Exploitation requires an affected ipw2100 or ipw2200 device using host TKIP verification, an active TKIP key, and a sender able to supply a non-replayed frame with a valid encrypted integrity check.

The record

CVE
CVE-2026-98193
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.14
  2. Affected versionversion=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <06f42accaf3c6aecab1dcc57f68dde6c06c8b380
  3. Affected versionversion=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <9a7fb67364817710c96785ff86b71a2711ee92cb
  4. Affected versionversion=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <ac7c08626f67844336086cf563f417566b76f0d7
  5. Affected versionversion=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <bb7ae8910cc886885aea95abb7c2e578a2341646

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.14; version=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <06f42accaf3c6aecab1dcc57f68dde6c06c8b380; version=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <9a7fb67364817710c96785ff86b71a2711ee92cb; version=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <ac7c08626f67844336086cf563f417566b76f0d7; version=b453872c35cfcbdbf5a794737817f7d4e7b1b579 <bb7ae8910cc886885aea95abb7c2e578a2341646

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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