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CVE Record

CVE-2024-35859: block: fix module reference leakage from bdev_open_by_dev error path

In the Linux kernel, the following vulnerability has been resolved: block: fix module reference leakage from bdev_open_by_dev error path At the time bdev_may_open() is called, module reference is grabbed already, hence module reference should be released if bdev_may_open() failed. This problem is found by code review.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-35859 is a Linux kernel availability issue in block-device handling. A failed device-open permission check can leak a module reference, potentially leaving resources stuck and affecting system availability. It requires local access with privileges and has no cited evidence of active exploitation.

Executive priority

Treat as routine but real patching work. The business risk is service disruption on affected Linux hosts, not data theft. Prioritize multi-user, internet-facing, and high-availability infrastructure in normal kernel maintenance windows.

Technical view

The flaw is in the Linux kernel block layer error path for bdev_open_by_dev. bdev_may_open is called after a module reference is already acquired, but failure did not release that reference. The issue was found by code review and fixed in referenced stable commits.

Likely exposure

Exposure is mainly Linux systems running affected kernel builds listed in the source bundle, including 6.8-era entries. Distro kernels may differ because of backports, so confirm by vendor advisory or kernel changelog.

Exploitation context

The CVSS vector is local, low complexity, low privilege, no user interaction, with high availability impact and no confidentiality or integrity impact. KEV is false, and the source bundle provides no evidence of public exploitation.

Researcher notes

The source identifies a module reference leak in an error path, not a memory corruption issue. Affected-version evidence is limited in the bundle; validate exact exposure against vendor kernel sources and stable commit inclusion.

Mitigation direction

  • Update to a vendor kernel containing the referenced Linux stable fixes.
  • Check distribution advisories for backported package versions.
  • Prioritize shared servers and systems with untrusted local users.
  • If no update is available, follow vendor guidance; no workaround is cited.

Validation and detection

  • Inventory Linux kernel versions across affected hosts.
  • Check kernel package changelogs for the referenced stable commits.
  • Confirm scanners map distro backports, not only upstream version strings.
  • Review local-user exposure on systems awaiting patches.
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-2024-35859 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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-2024-35859Attack 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
LinuxLinuxed5cc702d311c14b653323d76062b0294effa66e, ed5cc702d311c14b653323d76062b0294effa66eunaffected
LinuxLinux6.8, 0, 6.8.9, 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.