CVE-2024-44969

Kernel memory leak via failed SCLP halt

Published Sep 4, 2024 · Updated May 11, 2026

Memory leak in Linux kernel releases starting with 4.17 allows local users to consume kernel memory by interrupting an s390 SCLP Store Data operation. The sclp_sd_store_data error path frees referenced buffers without checking whether sclp_sd_sync successfully halted the interrupted request. The condition requires a rare hardware or firmware halt failure, after which a delayed SCLP write can target released memory and a few pages remain allocated.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux kernel releases starting with 4.17 allows local users to consume kernel memory by interrupting an s390 SCLP Store Data operation. The sclp_sd_store_data error path frees referenced buffers without checking whether sclp_sd_sync successfully halted the interrupted request. The condition requires a rare hardware or firmware halt failure, after which a delayed SCLP write can target released memory and a few pages remain allocated.

The record

CVE
CVE-2024-44969
Published
Sep 4, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 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=4.17
  2. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <1e8b7fb427af6b2ddd54eff66a6b428a81c96633
  3. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <1ec5ea9e25f582fd6999393e2f2c3bf56f234e05
  4. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <2429ea3b4330e3653b72b210a0d5f2a717359506
  5. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <46f67233b011385d53cf14d272431755de3a7c79
  6. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <7a7e60ed23d471a07dbbe72565d2992ee8244bbe
  7. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <a3e52a4c22c846858a6875e1c280030a3849e148
  8. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <a88a49473c94ccfd8dce1e766aacf3c627278463
  9. Affected versionversion=66aec647216f129b8560dba738303a8486481c53 <bf365071ea92b9579d5a272679b74052a5643e35

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.17; version=66aec647216f129b8560dba738303a8486481c53 <1e8b7fb427af6b2ddd54eff66a6b428a81c96633; version=66aec647216f129b8560dba738303a8486481c53 <1ec5ea9e25f582fd6999393e2f2c3bf56f234e05; version=66aec647216f129b8560dba738303a8486481c53 <2429ea3b4330e3653b72b210a0d5f2a717359506; version=66aec647216f129b8560dba738303a8486481c53 <46f67233b011385d53cf14d272431755de3a7c79; version=66aec647216f129b8560dba738303a8486481c53 <7a7e60ed23d471a07dbbe72565d2992ee8244bbe; version=66aec647216f129b8560dba738303a8486481c53 <a3e52a4c22c846858a6875e1c280030a3849e148; version=66aec647216f129b8560dba738303a8486481c53 <a88a49473c94ccfd8dce1e766aacf3c627278463; version=66aec647216f129b8560dba738303a8486481c53 <bf365071ea92b9579d5a272679b74052a5643e35

Published CVSS scores

5.5NISTCVSS: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

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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

CWE-401Missing Release of Memory after Effective Lifetime

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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