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CVE Record

CVE-2024-35808: md/dm-raid: don't call md_reap_sync_thread() directly

In the Linux kernel, the following vulnerability has been resolved: md/dm-raid: don't call md_reap_sync_thread() directly Currently md_reap_sync_thread() is called from raid_message() directly without holding 'reconfig_mutex', this is definitely unsafe because md_reap_sync_thread() can change many fields that is protected by 'reconfig_mutex'. However, hold 'reconfig_mutex' here is still problematic because this will cause deadlock, for example, commit 130443d60b1b ("md: refactor idle/frozen_sync_thread() to fix deadlock"). Fix this problem by using stop_sync_thread() to unregister sync_thread, like md/raid did.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A flaw in Linux’s device-mapper RAID handling can unsafely change protected RAID synchronization state. A user who already has low-privileged local access could potentially compromise confidentiality, integrity, or availability. It is not described as remotely exploitable.

Executive priority

Treat this as high priority on systems combining affected kernels, dm-raid usage, and access by untrusted local users. Schedule an accelerated kernel update for those hosts. Systems without dm-raid or without plausible local access are lower urgency, but should still follow supported vendor patch guidance.

Technical view

raid_message() called md_reap_sync_thread() without holding reconfig_mutex, allowing unsafe changes to protected fields. Acquiring that mutex directly could instead deadlock. The upstream correction uses stop_sync_thread() to unregister the synchronization thread consistently with md/raid behavior.

Likely exposure

Exposure is most relevant to systems running an affected Linux kernel and using md/dm-raid functionality. The bundle identifies releases including 3.10, 6.7.12, 6.8.3, and 6.9, but does not clearly define complete version boundaries or distribution backports.

Exploitation context

The CVSS vector indicates a local, low-complexity attack requiring low privileges and no user interaction. The bundle marks this CVE as absent from KEV and provides no evidence of active exploitation or a public exploit. Internet exposure alone does not provide the required local access.

Researcher notes

The source describes unsafe synchronization-state handling but does not specify a CWE, concrete corruption primitive, or demonstrated exploitation outcome. Do not infer memory corruption or privilege escalation solely from the 7.8 CVSS score. Exact affected and fixed package versions require distribution-specific confirmation.

Mitigation direction

  • Install a vendor-supported kernel update incorporating the referenced upstream stable fix.
  • Confirm the distribution’s package advisory because vendors may backport fixes without changing major kernel versions.
  • Restrict unnecessary local accounts and shell access until affected systems are updated.
  • Prioritize shared, multi-user, and other hosts where untrusted users can obtain local access.

Validation and detection

  • Inventory running kernel versions and identify hosts configured with md or device-mapper RAID.
  • Map each vendor kernel package to its advisory or included backported commits.
  • After updating and rebooting, confirm the fixed kernel is actually running.
  • Review RAID-related logs, recognizing that the supplied sources provide no vulnerability-specific detection indicator.
Prepared
Confidence
medium
Sources
5

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-2024-35808 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

1CVSS vectors
3Timeline events
2ADP providers
4Source links

SSVC decision data

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

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-35808Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
LinuxLinuxbe83651f0050ca8621d58d35dad558e9c45cb18f, be83651f0050ca8621d58d35dad558e9c45cb18f, be83651f0050ca8621d58d35dad558e9c45cb18funaffected
LinuxLinux3.10, 0, 6.7.12, 6.8.3, 6.9affected
Weakness

CWE details

No CWE listed

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