CVE-2026-93792

Kernel crash via unchecked WoWLAN packet length

Published Sep 24, 2026 · Updated Sep 24, 2026

Integer underflow in Linux's iwlwifi MVM WoWLAN handler allows attackers controlling Wi-Fi firmware to crash the kernel during resume. The iwl_mvm_report_wakeup_reasons function subtracts header and cryptographic overhead from a firmware-supplied packet length without first validating the remaining size, then passes that length to skb_put_data. Reachability requires an Intel iwlwifi MVM device with power management and WoWLAN enabled; a malformed firmware length causes an out-of-bounds copy during resume.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in Linux's iwlwifi MVM WoWLAN handler allows attackers controlling Wi-Fi firmware to crash the kernel during resume. The iwl_mvm_report_wakeup_reasons function subtracts header and cryptographic overhead from a firmware-supplied packet length without first validating the remaining size, then passes that length to skb_put_data. Reachability requires an Intel iwlwifi MVM device with power management and WoWLAN enabled; a malformed firmware length causes an out-of-bounds copy during resume.

The record

CVE
CVE-2026-93792
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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 <6.12.111
  2. Affected versionversion=0 <6.18.53
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0cb5260a1027a43f8cdb961e128f2ddd42e46832
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <38ad8339211bf24c19126ec7629ea52094676454
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <83f32942a501c80f44b8a8f668bc8b56d5d0d43f

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.111; version=0 <6.18.53; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0cb5260a1027a43f8cdb961e128f2ddd42e46832; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <38ad8339211bf24c19126ec7629ea52094676454; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <83f32942a501c80f44b8a8f668bc8b56d5d0d43f

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)
VectorUnavailable
PrivilegesUnavailable
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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