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CVE Record

CVE-2024-26617: fs/proc/task_mmu: move mmu notification mechanism inside mm lock

In the Linux kernel, the following vulnerability has been resolved: fs/proc/task_mmu: move mmu notification mechanism inside mm lock Move mmu notification mechanism inside mm lock to prevent race condition in other components which depend on it. The notifier will invalidate memory range. Depending upon the number of iterations, different memory ranges would be invalidated. The following warning would be removed by this patch: WARNING: CPU: 0 PID: 5067 at arch/x86/kvm/../../../virt/kvm/kvm_main.c:734 kvm_mmu_notifier_change_pte+0x860/0x960 arch/x86/kvm/../../../virt/kvm/kvm_main.c:734 There is no behavioural and performance change with this patch when there is no component registered with the mmu notifier. [akpm@linux-foundation.org: narrow the scope of `range', per Sean]

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue fixes a race condition in memory-management notification handling. The public record does not provide CVSS, a CWE, or confirmed business impact. It appears most relevant to systems running affected Linux kernel builds, especially where components depend on MMU notifier behavior such as KVM-related paths referenced in the warning.

Executive priority

Treat this as a kernel maintenance item with unknown severity. Prioritize normal patch governance, with faster review for virtualization infrastructure, but do not characterize it as actively exploited based on the provided sources.

Technical view

The fix moves MMU notification inside the mm lock in fs/proc/task_mmu to prevent races in dependent components. The record says the notifier invalidates memory ranges and references a KVM warning in kvm_mmu_notifier_change_pte. No behavioral or performance change is expected when no MMU notifier component is registered.

Likely exposure

Exposure is limited to Linux systems running affected kernel versions or commits identified by the CVE record. The bundle names Linux 6.7, 6.7.3, and 6.8-related version data, but does not provide distribution-specific package ranges or CPEs.

Exploitation context

The source bundle does not report active exploitation, and the CVE is not marked in KEV. The available evidence describes a kernel race condition and warning removal, not a public exploit path, attacker prerequisites, or observed attacks.

Researcher notes

Evidence is sparse: no CVSS, CWE, CPEs, exploit status, or distribution advisories are included. Analysis should stay anchored to upstream commits and vendor backports. The KVM warning suggests a concurrency correctness issue, but impact beyond warning/race prevention is not established here.

Mitigation direction

  • Check Linux distribution advisories for CVE-2024-26617 coverage.
  • Apply vendor kernel updates containing the referenced stable commits.
  • Prioritize virtualization or KVM hosts if affected.
  • Track vendor backports because package versions may differ from upstream versions.

Validation and detection

  • Inventory Linux kernel versions across servers and images.
  • Compare installed kernel packages with vendor CVE advisories.
  • Check changelogs for CVE-2024-26617 or the referenced commit IDs.
  • Identify hosts using KVM or MMU-notifier-dependent workloads.
  • Confirm updated hosts boot the patched kernel.
Prepared
Confidence
medium
Sources
4

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-2024-26617 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
3Source 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
LinuxLinux52526ca7fdb905a768a93f8faa418e9b988fc34b, 52526ca7fdb905a768a93f8faa418e9b988fc34bunaffected
LinuxLinux6.7, 0, 6.7.3, 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.