CVE-2023-52531

Kernel memory corruption via misaligned bitrate pointer

Published Mar 2, 2024 · Updated May 11, 2026

Memory corruption in the Linux iwlwifi MVM driver from 3.9 through affected 6.6 release candidates allows local users to corrupt kernel memory. In drivers/net/wireless/intel/iwlwifi/mvm/fw.c, a byte-pointer cast advances the bitrate pointer by one byte instead of one channel structure. Reachability requires local low-privileged access and the iwlwifi MVM path; published sources document no concrete trigger or higher-level outcome.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux iwlwifi MVM driver from 3.9 through affected 6.6 release candidates allows local users to corrupt kernel memory. In drivers/net/wireless/intel/iwlwifi/mvm/fw.c, a byte-pointer cast advances the bitrate pointer by one byte instead of one channel structure. Reachability requires local low-privileged access and the iwlwifi MVM path; published sources document no concrete trigger or higher-level outcome.

The record

CVE
CVE-2023-52531
Published
Mar 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=3.9
  2. Affected versionversion=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <6b3223449c959a8be94a1f042288059e40fcccb0
  3. Affected versionversion=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <7c8faa31080342aec4903c9acb20caf82fcca1ef
  4. Affected versionversion=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d
  5. Affected versionversion=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <f06cdd8d4ba5252986f51f80cc30263636397128

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.9; version=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <6b3223449c959a8be94a1f042288059e40fcccb0; version=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <7c8faa31080342aec4903c9acb20caf82fcca1ef; version=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d; version=8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c <f06cdd8d4ba5252986f51f80cc30263636397128

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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