CVE-2024-36880

Kernel memory corruption via unchecked firmware lengths

Published May 30, 2024 · Updated Aug 5, 2026

Memory corruption in the QCA Bluetooth firmware parser in Linux allows local users to corrupt kernel memory via a crafted firmware file. The qca_tlv_check_data function trusts a 24-bit TLV length and advances through NVM tags beyond the vmalloced firmware buffer, then reads and writes out of bounds. Exploitation requires write access to a local firmware search path and QCA Bluetooth device initialization; the corruption can disclose data, alter kernel memory, or panic the system.

CVSS severity7.8
High
EPSS probability0.25%
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 QCA Bluetooth firmware parser in Linux allows local users to corrupt kernel memory via a crafted firmware file. The qca_tlv_check_data function trusts a 24-bit TLV length and advances through NVM tags beyond the vmalloced firmware buffer, then reads and writes out of bounds. Exploitation requires write access to a local firmware search path and QCA Bluetooth device initialization; the corruption can disclose data, alter kernel memory, or panic the system.

The record

CVE
CVE-2024-36880
Published
May 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.3
  2. Affected versionversion=83e81961ff7ef75f97756f316caea5aa6bcc19cc <02f05ed44b71152d5e11d29be28aed91c0489b4e
  3. Affected versionversion=83e81961ff7ef75f97756f316caea5aa6bcc19cc <1caceadfb50432dbf6d808796cb6c34ebb6d662c
  4. Affected versionversion=83e81961ff7ef75f97756f316caea5aa6bcc19cc <2e4edfa1e2bd821a317e7d006517dcf2f3fac68d
  5. Affected versionversion=83e81961ff7ef75f97756f316caea5aa6bcc19cc <427281f9498ed614f9aabc80e46ec077c487da6d
  6. Affected versionversion=83e81961ff7ef75f97756f316caea5aa6bcc19cc <ed53949cc92e28aaa3463d246942bda1fbb7f307

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.3; version=83e81961ff7ef75f97756f316caea5aa6bcc19cc <02f05ed44b71152d5e11d29be28aed91c0489b4e; version=83e81961ff7ef75f97756f316caea5aa6bcc19cc <1caceadfb50432dbf6d808796cb6c34ebb6d662c; version=83e81961ff7ef75f97756f316caea5aa6bcc19cc <2e4edfa1e2bd821a317e7d006517dcf2f3fac68d; version=83e81961ff7ef75f97756f316caea5aa6bcc19cc <427281f9498ed614f9aabc80e46ec077c487da6d; version=83e81961ff7ef75f97756f316caea5aa6bcc19cc <ed53949cc92e28aaa3463d246942bda1fbb7f307

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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