CVE-2026-63832

Kernel-memory corruption via published WCID reinitialization

Published Jul 19, 2026 · Updated Jul 19, 2026

Race condition in the mt76 Wi-Fi driver in Linux Kernel allows physically proximate attackers to corrupt kernel memory through Wi-Fi traffic. mt76_sta_add reinitializes wcid->poll_list after mt7925_mac_sta_add publishes the WCID, allowing concurrent RX polling to turn the list link into a self-reference. The affected system must use the MT7925 driver path during station reauthentication; the published failure is kernel list corruption and service interruption.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the mt76 Wi-Fi driver in Linux Kernel allows physically proximate attackers to corrupt kernel memory through Wi-Fi traffic. mt76_sta_add reinitializes wcid->poll_list after mt7925_mac_sta_add publishes the WCID, allowing concurrent RX polling to turn the list link into a self-reference. The affected system must use the MT7925 driver path during station reauthentication; the published failure is kernel list corruption and service interruption.

The record

CVE
CVE-2026-63832
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=0 <6.18.38
  2. Affected versionversion=0 <7.1.3
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <20b126920a259df4d7dcae19fcfe2c57a74d6b2e
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c499851753a24d2e148d4e9ca51764c0c51554e
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55e014aaec650ede08b693ba59c8d0443f13f11c

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <6.18.38; version=0 <7.1.3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <20b126920a259df4d7dcae19fcfe2c57a74d6b2e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c499851753a24d2e148d4e9ca51764c0c51554e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55e014aaec650ede08b693ba59c8d0443f13f11c

Published CVSS scores

8.8kernel.orgCVSS: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.

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

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

No sourced classifications are available.

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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