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CVE Record

CVE-2024-26602: sched/membarrier: reduce the ability to hammer on sys_membarrier

In the Linux kernel, the following vulnerability has been resolved: sched/membarrier: reduce the ability to hammer on sys_membarrier On some systems, sys_membarrier can be very expensive, causing overall slowdowns for everything. So put a lock on the path in order to serialize the accesses to prevent the ability for this to be called at too high of a frequency and saturate the machine.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-26602 is a Linux kernel issue where repeated sys_membarrier calls can be expensive enough to slow an entire system. The kernel fix serializes that path to reduce rapid repeated use. The source bundle does not provide CVSS, CWE, or evidence of active exploitation.

Executive priority

Treat this as a moderate operational availability risk. It is not reported as actively exploited, but affected shared Linux systems could suffer broad slowdown. Patch through normal kernel update channels, prioritizing multi-tenant and high-availability hosts.

Technical view

The flaw is in the Linux kernel scheduler/membarrier path. On some systems, sys_membarrier can be costly; excessive call frequency may saturate the machine and cause broad performance degradation. Stable kernel commits address this by locking and serializing access to the affected path.

Likely exposure

Exposure is most relevant on Linux hosts running affected kernel versions listed in the CVE record, especially systems allowing untrusted local workloads. The provided data does not identify remote exposure or affected non-Linux products.

Exploitation context

The bundle describes potential system slowdown from high-frequency sys_membarrier use. KEV is false, and no cited source states active exploitation. Practical impact appears denial-of-service or resource exhaustion rather than data compromise, based on the provided description.

Researcher notes

Evidence is limited to the CVE text, upstream stable commits, and Debian LTS references. No CVSS vector, CWE, proof-of-concept, or exploit-in-the-wild claim is provided. Avoid assuming remote reachability or privilege requirements beyond the described syscall abuse condition.

Mitigation direction

  • Update to a vendor kernel containing the referenced stable fixes.
  • Check Linux distribution advisories for exact fixed package versions.
  • Prioritize multi-tenant or untrusted workload hosts for patching.
  • Where patching is pending, reduce exposure to untrusted local code.

Validation and detection

  • Inventory running Linux kernel versions against the CVE affected version data.
  • Confirm vendor packages include the referenced stable kernel commits or backports.
  • Review Debian LTS or relevant distribution advisories for package status.
  • Monitor for unexplained host-wide slowdowns on affected systems.
Prepared
Confidence
medium
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-26602 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
11Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux22e4ebb975822833b083533035233d128b30e98f, 22e4ebb975822833b083533035233d128b30e98f, 22e4ebb975822833b083533035233d128b30e98f, 22e4ebb975822833b083533035233d128b30e98f, 22e4ebb975822833b083533035233d128b30e98f, 22e4ebb975822833b083533035233d128b30e98f, 22e4ebb975822833b083533035233d128b30e98f, 22e4ebb975822833b083533035233d128b30e98funaffected
LinuxLinux4.14, 0, 4.19.307, 5.4.269, 5.10.210, 5.15.149, 6.1.79, 6.6.18, 6.7.6, 6.8affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.