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CVE Record

CVE-2024-26758: md: Don't ignore suspended array in md_check_recovery()

In the Linux kernel, the following vulnerability has been resolved: md: Don't ignore suspended array in md_check_recovery() mddev_suspend() never stop sync_thread, hence it doesn't make sense to ignore suspended array in md_check_recovery(), which might cause sync_thread can't be unregistered. After commit f52f5c71f3d4 ("md: fix stopping sync thread"), following hang can be triggered by test shell/integrity-caching.sh: 1) suspend the array: raid_postsuspend mddev_suspend 2) stop the array: raid_dtr md_stop __md_stop_writes stop_sync_thread set_bit(MD_RECOVERY_INTR, &mddev->recovery); md_wakeup_thread_directly(mddev->sync_thread); wait_event(..., !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) 3) sync thread done: md_do_sync set_bit(MD_RECOVERY_DONE, &mddev->recovery); md_wakeup_thread(mddev->thread); 4) daemon thread can't unregister sync thread: md_check_recovery if (mddev->suspended) return; -> return directly md_read_sync_thread clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); -> MD_RECOVERY_RUNNING can't be cleared, hence step 2 hang; This problem is not just related to dm-raid, fix it by ignoring suspended array in md_check_recovery(). And follow up patches will improve dm-raid better to frozen sync thread during suspend.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A Linux software RAID bug can leave a storage recovery thread stuck when an array is suspended and then stopped. The practical impact is an availability failure: affected systems may hang during RAID teardown or recovery handling. It requires local privileges and the provided sources do not show active exploitation.

Executive priority

Treat as a moderate availability risk for Linux storage infrastructure. It is not a data-theft issue, but storage hangs can affect uptime on systems depending on software RAID. Patch during normal kernel maintenance, faster for critical storage hosts.

Technical view

md_check_recovery() returned early for suspended md arrays, preventing md_read_sync_thread() from clearing MD_RECOVERY_RUNNING after MD_RECOVERY_DONE. That can make stop_sync_thread() wait indefinitely. The CVSS vector is local, low complexity, low privileges, no user interaction, and high availability impact only.

Likely exposure

Exposure is most likely on Linux systems using md RAID or dm-raid paths with affected kernel versions. The provided data names Linux kernel versions from 3.0 through 6.8 contextually, but distro backports may change practical exposure.

Exploitation context

The sources describe a reproducible hang in RAID suspend and stop handling, not remote compromise. KEV is false, and no cited source in the bundle reports exploitation in the wild.

Researcher notes

Focus analysis on md recovery state handling around suspended arrays. The root issue is recovery thread cleanup being skipped while suspended, leaving MD_RECOVERY_RUNNING uncleared. Evidence is limited to CVE text and stable kernel commit references.

Mitigation direction

  • Update to a vendor kernel containing the referenced stable fixes.
  • Prioritize hosts using Linux md RAID or dm-raid storage.
  • Check distribution advisories for backported fixes before relying on version numbers.
  • Restrict unnecessary local shell access on storage-critical systems.
  • Schedule remediation to avoid unplanned storage service disruption.

Validation and detection

  • Inventory Linux kernel versions on systems using md RAID or dm-raid.
  • Confirm whether vendor packages include the referenced stable commits.
  • Review logs for md recovery, suspend, stop, or sync thread hangs.
  • Test RAID suspend, stop, and recovery workflows in staging after patching.
  • Track any vendor-specific advisories for affected platform scope.
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

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-129: Exact CWE lookup

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cve · low confidence lookup

CVE-2024-26758 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
3Source 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
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2024-26758Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
cvssV3_1other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux68866e425be2ef2664aa5c691bb3ab789736acf5, 68866e425be2ef2664aa5c691bb3ab789736acf5unaffected
LinuxLinux3.0, 0, 6.7.7, 6.8affected
Weakness

CWE details

CWE-129

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

CWE-129 · source CWE mapping

Improper Validation of Array Index

Improper Validation of Array Index represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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