CVE-2024-43869

Local service interruption via perf-event release race

Published Aug 21, 2024 · Updated May 23, 2026

Resource leak in the Linux kernel perf subsystem allows local users to exhaust memory through perf-event release races. The free_event path releases a child event without synchronizing pending task work, leaving a reference that prevents the perf_event object from being freed. A local low-privileged user must trigger the race during exec or concurrent file release; repeated leaks can exhaust kernel memory and interrupt service.

CVSS severity5.5
Medium
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

Resource leak in the Linux kernel perf subsystem allows local users to exhaust memory through perf-event release races. The free_event path releases a child event without synchronizing pending task work, leaving a reference that prevents the perf_event object from being freed. A local low-privileged user must trigger the race during exec or concurrent file release; repeated leaks can exhaust kernel memory and interrupt service.

The record

CVE
CVE-2024-43869
Published
Aug 21, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.15.84 <5.15.165
  2. Affected versionversion=517e6a301f34613bff24a8e35b5455884f2d83d8 <104e258a004037bc7dba9f6085c71dad6af57ad4
  3. Affected versionversion=517e6a301f34613bff24a8e35b5455884f2d83d8 <3a5465418f5fd970e86a86c7f4075be262682840
  4. Affected versionversion=517e6a301f34613bff24a8e35b5455884f2d83d8 <ed2c202dac55423a52d7e2290f2888bf08b8ee99
  5. Affected versionversion=517e6a301f34613bff24a8e35b5455884f2d83d8 <f34d8307a73a18de5320fcc6f40403146d061891
  6. Affected versionversion=6.0.14 <6.1
  7. Affected versionversion=6.1
  8. Affected versionversion=78e1317a174edbfd1182599bf76c092a2877672c
  9. Affected versionversion=8bffa95ac19ff27c8261904f89d36c7fcf215d59 <9ad46f1fef421d43cdab3a7d1744b2f43b54dae0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15.84 <5.15.165; version=517e6a301f34613bff24a8e35b5455884f2d83d8 <104e258a004037bc7dba9f6085c71dad6af57ad4; version=517e6a301f34613bff24a8e35b5455884f2d83d8 <3a5465418f5fd970e86a86c7f4075be262682840; version=517e6a301f34613bff24a8e35b5455884f2d83d8 <ed2c202dac55423a52d7e2290f2888bf08b8ee99; version=517e6a301f34613bff24a8e35b5455884f2d83d8 <f34d8307a73a18de5320fcc6f40403146d061891; version=6.0.14 <6.1; version=6.1; version=78e1317a174edbfd1182599bf76c092a2877672c; version=8bffa95ac19ff27c8261904f89d36c7fcf215d59 <9ad46f1fef421d43cdab3a7d1744b2f43b54dae0

Published CVSS scores

5.5NIST NVDCVSS: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.

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

CWE-401Missing Release of Memory after Effective Lifetime
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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