CVE-2026-23246

Kernel stack corruption via unchecked Wi-Fi link index

Published Mar 18, 2026 · Updated Mar 18, 2026

An out-of-bounds write in the Linux Kernel mac80211 subsystem allows remote attackers to corrupt kernel stack memory via Wi-Fi. The ieee80211_ml_reconfiguration function uses a four-bit link_id from an ML Reconfiguration element to index the 15-entry link_removal_timeout array without first rejecting index 15. Reachability requires a device using mac80211 to process a crafted element from within wireless range; the resulting write corrupts adjacent kernel stack data.

CVSS severity8.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in the Linux Kernel mac80211 subsystem allows remote attackers to corrupt kernel stack memory via Wi-Fi. The ieee80211_ml_reconfiguration function uses a four-bit link_id from an ML Reconfiguration element to index the 15-entry link_removal_timeout array without first rejecting index 15. Reachability requires a device using mac80211 to process a crafted element from within wireless range; the resulting write corrupts adjacent kernel stack data.

The record

CVE
CVE-2026-23246
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-129
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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=6.5
  2. Affected versionversion=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <162d331d833dc73a3e905a24c44dd33732af1fc5
  3. Affected versionversion=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <bfde158d5d1322c0c2df398a8d1ccce04943be2e
  4. Affected versionversion=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <d58d71c2167601762351962b9604808d3be94400
  5. Affected versionversion=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <f35ceec54d48e227fa46f8f97fd100a77b8eab15

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.5; version=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <162d331d833dc73a3e905a24c44dd33732af1fc5; version=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <bfde158d5d1322c0c2df398a8d1ccce04943be2e; version=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <d58d71c2167601762351962b9604808d3be94400; version=8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c <f35ceec54d48e227fa46f8f97fd100a77b8eab15

Published CVSS scores

8.8Linux kernel CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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