CVE-2024-43900

Local kernel compromise via stale tuner callback

Published Aug 26, 2024 · Updated May 11, 2026

Use-after-free in the Linux xc2028 tuner driver allows local users to read or modify kernel data or crash the system. The load_firmware_cb worker dereferences a struct tuner after tuner_remove frees the enclosing dvb_frontend during failed module initialization. Reachability requires low-privileged local access and an xc2028/em28xx device path whose initialization fails while an asynchronous firmware request remains pending.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux xc2028 tuner driver allows local users to read or modify kernel data or crash the system. The load_firmware_cb worker dereferences a struct tuner after tuner_remove frees the enclosing dvb_frontend during failed module initialization. Reachability requires low-privileged local access and an xc2028/em28xx device path whose initialization fails while an asynchronous firmware request remains pending.

The record

CVE
CVE-2024-43900
Published
Aug 26, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 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=3.6
  2. Affected versionversion=61a96113de51e1f8f43ac98cbeadb54e60045905 <208deb6d8c3cb8c3acb1f41eb31cf68ea08726d5
  3. Affected versionversion=61a96113de51e1f8f43ac98cbeadb54e60045905 <68594cec291ff9523b9feb3f43fd853dcddd1f60
  4. Affected versionversion=61a96113de51e1f8f43ac98cbeadb54e60045905 <850304152d367f104d21c77cfbcc05806504218b
  5. Affected versionversion=61a96113de51e1f8f43ac98cbeadb54e60045905 <ef517bdfc01818419f7bd426969a0c86b14f3e0e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.6; version=61a96113de51e1f8f43ac98cbeadb54e60045905 <208deb6d8c3cb8c3acb1f41eb31cf68ea08726d5; version=61a96113de51e1f8f43ac98cbeadb54e60045905 <68594cec291ff9523b9feb3f43fd853dcddd1f60; version=61a96113de51e1f8f43ac98cbeadb54e60045905 <850304152d367f104d21c77cfbcc05806504218b; version=61a96113de51e1f8f43ac98cbeadb54e60045905 <ef517bdfc01818419f7bd426969a0c86b14f3e0e

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.4SUSECVSS:3.1/AV:L/AC:H/PR:H/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-416Use After Free
T1068Exploitation for Privilege Escalation

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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