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CVE Record

CVE-2024-26734: devlink: fix possible use-after-free and memory leaks in devlink_init()

In the Linux kernel, the following vulnerability has been resolved: devlink: fix possible use-after-free and memory leaks in devlink_init() The pernet operations structure for the subsystem must be registered before registering the generic netlink family. Make an unregister in case of unsuccessful registration.

HighCVSS 7Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A flaw in Linux devlink initialization can leave kernel networking resources in an unsafe state, creating possible use-after-free and memory-leak conditions. A successful attack could compromise confidentiality, integrity, and availability, but the supplied CVSS assessment requires local access, low privileges, and high attack complexity.

Executive priority

Treat as a high-priority kernel maintenance issue rather than an internet-wide emergency. Schedule prompt remediation on exposed multi-user or shared-compute systems. Accelerate action where untrusted users have local accounts or workloads, while following vendor guidance because the available evidence does not establish remote or active exploitation.

Technical view

devlink_init() registered its generic netlink family before the subsystem’s per-network-namespace operations. The corrected design registers pernet operations first and unregisters them if later registration fails. This addresses possible use-after-free and memory leaks during initialization or failed setup.

Likely exposure

The source bundle identifies Linux versions 6.3, 6.6.19, 6.7.7, and 6.8 as affected. Distribution kernels may carry backported fixes despite their displayed version, so exposure cannot be determined from version numbers alone. Systems where untrusted local users can run code deserve closer attention.

Exploitation context

The CVSS vector describes a local, high-complexity attack requiring low privileges and no user interaction, with potentially high confidentiality, integrity, and availability impact. The bundle states this CVE is not in KEV and provides no evidence of active exploitation or a public exploit.

Researcher notes

The security issue concerns initialization and error-path lifetime management, not an identified remote packet-processing flaw. Three stable-kernel commits are supplied, likely reflecting fixes for different maintained branches. The bundle does not map each commit to a specific version or provide exploitability prerequisites beyond the CVSS vector.

Mitigation direction

  • Apply a vendor-supported kernel update containing the applicable stable fix.
  • Check distribution security advisories for backported fixes before relying on kernel version strings.
  • Prioritize multi-user systems and hosts permitting untrusted local code execution.
  • Use normal change controls and reboot requirements specified by the kernel vendor.

Validation and detection

  • Inventory running kernel versions across Linux hosts.
  • Confirm package changelogs or vendor advisories explicitly reference CVE-2024-26734 or its fix.
  • Verify the applicable stable fix is present in custom-built kernels.
  • After updating, confirm hosts are running the corrected kernel, not merely storing it.
Prepared
Confidence
high
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-2024-26734 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:H/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
7CVSS 3.1HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7High
CVSS 3.1 vector shape for CVE-2024-26734Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:H/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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux687125b5799cd5120437fa455cfccbe8537916ff, 687125b5799cd5120437fa455cfccbe8537916ff, 687125b5799cd5120437fa455cfccbe8537916ffunaffected
LinuxLinux6.3, 0, 6.6.19, 6.7.7, 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.