CVE-2026-93788

Unspecified impact via unchecked WGDS revision shift

Published Sep 24, 2026 · Updated Sep 24, 2026

Undefined shift in Linux iwlwifi before 6.12.111 or 6.18.53 allows attackers to cause unspecified impact through malformed WGDS data. The iwl_acpi_get_wgds_table function passes an unchecked firmware-supplied revision to BIT(tbl_rev), although its revision mask represents only indices 0 through 7. Reachability requires an Intel Wi-Fi ACPI platform whose firmware supplies an out-of-range WGDS revision during driver initialization; published evidence identifies undefined behavior but no demonstrated crash or exploit.

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

Undefined shift in Linux iwlwifi before 6.12.111 or 6.18.53 allows attackers to cause unspecified impact through malformed WGDS data. The iwl_acpi_get_wgds_table function passes an unchecked firmware-supplied revision to BIT(tbl_rev), although its revision mask represents only indices 0 through 7. Reachability requires an Intel Wi-Fi ACPI platform whose firmware supplies an out-of-range WGDS revision during driver initialization; published evidence identifies undefined behavior but no demonstrated crash or exploit.

The record

CVE
CVE-2026-93788
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <2fc98ab6fe8acabd13eb09dc17426a33cf9f27f7
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <346a558491241cbe8fef82b3d8f62d1a6b6bf61f
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <954e821f42aaca56073ca830c5fd4bcf1a89048c

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 <2fc98ab6fe8acabd13eb09dc17426a33cf9f27f7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <346a558491241cbe8fef82b3d8f62d1a6b6bf61f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <954e821f42aaca56073ca830c5fd4bcf1a89048c

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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