CVE-2026-98345Public exploit

Uninitialized header read via short IP-like frame

Published Oct 6, 2026 · Updated Oct 6, 2026

An uninitialized header read in the Linux Wi-Fi classifier allows local users to trigger incorrect traffic classification by transmitting a short IP-like frame. In cfg80211_classify8021d(), the IPv4 and IPv6 branches read the differentiated-services field without first confirming that the frame contains a full IP header. The demonstrated path uses packet_sendmsg on a Wi-Fi interface; the published report establishes a KMSAN uninitialized-value finding, not data disclosure or code execution.

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 uninitialized header read in the Linux Wi-Fi classifier allows local users to trigger incorrect traffic classification by transmitting a short IP-like frame. In cfg80211_classify8021d(), the IPv4 and IPv6 branches read the differentiated-services field without first confirming that the frame contains a full IP header. The demonstrated path uses packet_sendmsg on a Wi-Fi interface; the published report establishes a KMSAN uninitialized-value finding, not data disclosure or code execution.

The record

CVE
CVE-2026-98345
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
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=2.6.31
  2. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <12c0abd4d1c1b04a7663d04ba85268bc9ad9c017
  3. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <18d5547327c202cda33ad2bbd203220c2c62c8a7
  4. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734
  5. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <48b2c5c628b09cf36cbeca53e0432fc2a7518be7
  6. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <65893c8d28f239c7ddad5a83683be193a9133e9b
  7. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <a2cdb4a675ca04c4ac8cc962848082d8ce065008
  8. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <c4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7
  9. Affected versionversion=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <f33ad4e2f846e55cf4637419268f093ac9f1a765

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.31; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <12c0abd4d1c1b04a7663d04ba85268bc9ad9c017; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <18d5547327c202cda33ad2bbd203220c2c62c8a7; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <48b2c5c628b09cf36cbeca53e0432fc2a7518be7; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <65893c8d28f239c7ddad5a83683be193a9133e9b; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <a2cdb4a675ca04c4ac8cc962848082d8ce065008; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <c4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7; version=e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 <f33ad4e2f846e55cf4637419268f093ac9f1a765

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.

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No observations available

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

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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