CVE-2024-43861

Service interruption via leaked non-IP packet buffers

Published Aug 20, 2024 · Updated May 11, 2026

Memory exhaustion in Linux kernel 4.12 through 6.11-rc2 allows local users to interrupt service via non-IP QMAP packets. qmimux_rx_fixup allocates a new sk_buff before inspecting the packet's IP version, then skips an unrecognized packet without freeing that buffer. Exposure requires an active qmi_wwan QMAP receive path and the ability to cause repeated non-IP packets to arrive; accumulated allocations can exhaust memory.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in Linux kernel 4.12 through 6.11-rc2 allows local users to interrupt service via non-IP QMAP packets. qmimux_rx_fixup allocates a new sk_buff before inspecting the packet's IP version, then skips an unrecognized packet without freeing that buffer. Exposure requires an active qmi_wwan QMAP receive path and the ability to cause repeated non-IP packets to arrive; accumulated allocations can exhaust memory.

The record

CVE
CVE-2024-43861
Published
Aug 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 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=4.12
  2. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <37c093449704017870604994ba9b813cdb9475a4
  3. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <3c90a69533b5bba73401ef884d033ea49ee99662
  4. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <7ab107544b777c3bd7feb9fe447367d8edd5b202
  5. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <c4251a3deccad852b27e60625f31fba6cc14372f
  6. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <c6c5b91424fafc0f83852d961c10c7e43a001882
  7. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <da518cc9b64df391795d9952aed551e0f782e446
  8. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <e87f52225e04a7001bf55bbd7a330fa4252327b5
  9. Affected versionversion=c6adf77953bcec0ad63d7782479452464e50f7a3 <f2c353227de14b0289298ffc3ba92058c4768384

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <37c093449704017870604994ba9b813cdb9475a4; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <3c90a69533b5bba73401ef884d033ea49ee99662; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <7ab107544b777c3bd7feb9fe447367d8edd5b202; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <c4251a3deccad852b27e60625f31fba6cc14372f; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <c6c5b91424fafc0f83852d961c10c7e43a001882; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <da518cc9b64df391795d9952aed551e0f782e446; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <e87f52225e04a7001bf55bbd7a330fa4252327b5; version=c6adf77953bcec0ad63d7782479452464e50f7a3 <f2c353227de14b0289298ffc3ba92058c4768384

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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