CVE-2024-43892

Kernel crash via unsynchronized memcg ID removal

Published Aug 26, 2024 · Updated Aug 5, 2026

Race condition in affected Linux kernel branches allows local users to crash the system during concurrent memory-cgroup teardown. The memcg teardown path calls idr_remove() on mem_cgroup_idr without cgroup_mutex, allowing concurrent modifications to corrupt ID assignments. Low-privileged local access and a difficult race are required; duplicate IDs can remove another cgroup's list_lru state and crash the kernel.

CVSS severity4.7
Medium
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

Race condition in affected Linux kernel branches allows local users to crash the system during concurrent memory-cgroup teardown. The memcg teardown path calls idr_remove() on mem_cgroup_idr without cgroup_mutex, allowing concurrent modifications to corrupt ID assignments. Low-privileged local access and a difficult race are required; duplicate IDs can remove another cgroup's list_lru state and crash the kernel.

The record

CVE
CVE-2024-43892
Published
Aug 26, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 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=4.4.18 <4.5
  2. Affected versionversion=4.6.6 <4.7
  3. Affected versionversion=4.7
  4. Affected versionversion=73f576c04b9410ed19660f74f97521bee6e1c546 <37a060b64ae83b76600d187d76591ce488ab836b
  5. Affected versionversion=73f576c04b9410ed19660f74f97521bee6e1c546 <51c0b1bb7541f8893ec1accba59eb04361a70946
  6. Affected versionversion=73f576c04b9410ed19660f74f97521bee6e1c546 <56fd70f4aa8b82199dbe7e99366b1fd7a04d86fb
  7. Affected versionversion=73f576c04b9410ed19660f74f97521bee6e1c546 <912736a0435ef40e6a4ae78197ccb5553cb80b05
  8. Affected versionversion=73f576c04b9410ed19660f74f97521bee6e1c546 <9972605a238339b85bd16b084eed5f18414d22db
  9. Affected versionversion=73f576c04b9410ed19660f74f97521bee6e1c546 <e6cc9ff2ac0b5df9f25eb790934c3104f6710278
  10. Affected versionversion=8627c7750a66a46d56d3564e1e881aa53764497c
  11. Affected versionversion=db70cd18d3da727a3a59694de428a9e41c620de7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.4.18 <4.5; version=4.6.6 <4.7; version=4.7; version=73f576c04b9410ed19660f74f97521bee6e1c546 <37a060b64ae83b76600d187d76591ce488ab836b; version=73f576c04b9410ed19660f74f97521bee6e1c546 <51c0b1bb7541f8893ec1accba59eb04361a70946; version=73f576c04b9410ed19660f74f97521bee6e1c546 <56fd70f4aa8b82199dbe7e99366b1fd7a04d86fb; version=73f576c04b9410ed19660f74f97521bee6e1c546 <912736a0435ef40e6a4ae78197ccb5553cb80b05; version=73f576c04b9410ed19660f74f97521bee6e1c546 <9972605a238339b85bd16b084eed5f18414d22db; version=73f576c04b9410ed19660f74f97521bee6e1c546 <e6cc9ff2ac0b5df9f25eb790934c3104f6710278; version=8627c7750a66a46d56d3564e1e881aa53764497c; version=db70cd18d3da727a3a59694de428a9e41c620de7

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499.004Application or System Exploitation

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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