CVE-2024-26602

System-wide slowdown via unserialized membarrier calls

Published Feb 24, 2024 · Updated May 11, 2026

Denial of service in affected Linux kernel versions allows local users to slow the system by repeatedly invoking sys_membarrier. The expedited membarrier paths in kernel/sched/membarrier.c issue costly interprocessor interrupts without global serialization, allowing callers to saturate the machine. A local low-privileged account and a system where the syscall is expensive are required; the consequence is an overall workload slowdown.

CVSS severity4.7
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux kernel versions allows local users to slow the system by repeatedly invoking sys_membarrier. The expedited membarrier paths in kernel/sched/membarrier.c issue costly interprocessor interrupts without global serialization, allowing callers to saturate the machine. A local low-privileged account and a system where the syscall is expensive are required; the consequence is an overall workload slowdown.

The record

CVE
CVE-2024-26602
Published
Feb 24, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 24, 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=22e4ebb975822833b083533035233d128b30e98f <2441a64070b85c14eecc3728cc87e883f953f265
  2. Affected versionversion=22e4ebb975822833b083533035233d128b30e98f <24ec7504a08a67247fbe798d1de995208a8c128a
  3. Affected versionversion=22e4ebb975822833b083533035233d128b30e98f <3cd139875e9a7688b3fc715264032620812a5fa3
  4. Affected versionversion=22e4ebb975822833b083533035233d128b30e98f <50fb4e17df319bb33be6f14e2a856950c1577dee
  5. Affected versionversion=22e4ebb975822833b083533035233d128b30e98f <944d5fe50f3f03daacfea16300e656a1691c4a23
  6. Affected versionversion=22e4ebb975822833b083533035233d128b30e98f <b6a2a9cbb67545c825ec95f06adb7ff300a2ad71
  7. Affected versionversion=22e4ebb975822833b083533035233d128b30e98f <c5b2063c65d05e79fad8029324581d86cfba7eea
  8. Affected versionversion=22e4ebb975822833b083533035233d128b30e98f <db896bbe4a9c67cee377e5f6a743350d3ae4acf6
  9. Affected versionversion=4.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=22e4ebb975822833b083533035233d128b30e98f <2441a64070b85c14eecc3728cc87e883f953f265; version=22e4ebb975822833b083533035233d128b30e98f <24ec7504a08a67247fbe798d1de995208a8c128a; version=22e4ebb975822833b083533035233d128b30e98f <3cd139875e9a7688b3fc715264032620812a5fa3; version=22e4ebb975822833b083533035233d128b30e98f <50fb4e17df319bb33be6f14e2a856950c1577dee; version=22e4ebb975822833b083533035233d128b30e98f <944d5fe50f3f03daacfea16300e656a1691c4a23; version=22e4ebb975822833b083533035233d128b30e98f <b6a2a9cbb67545c825ec95f06adb7ff300a2ad71; version=22e4ebb975822833b083533035233d128b30e98f <c5b2063c65d05e79fad8029324581d86cfba7eea; version=22e4ebb975822833b083533035233d128b30e98f <db896bbe4a9c67cee377e5f6a743350d3ae4acf6; version=4.14

Published CVSS scores

4.7OracleCVSS:3.0/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

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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

No sourced classifications are available.

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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