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CVE Record

CVE-2024-27404: mptcp: fix data races on remote_id

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data races on remote_id Similar to the previous patch, address the data race on remote_id, adding the suitable ONCE annotations.

HighCVSS 8.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A race condition in Linux Multipath TCP (MPTCP) can cause inconsistent handling of a remote endpoint identifier. The supplied CVSS assessment indicates a remote, unauthenticated attacker could primarily disrupt availability and potentially cause limited integrity impact. The bundle does not describe confidentiality loss.

Executive priority

Treat as a high-priority availability risk, especially for exposed or business-critical Linux services using MPTCP. Validate applicability promptly, then patch through supported distribution channels. Immediate emergency action is not supported by the supplied exploitation evidence.

Technical view

Concurrent access to MPTCP's remote_id lacked suitable one-time access annotations, creating a data race. Linux stable fixes add the required ONCE annotations. CVSS 3.1 is 8.2: network-accessible, low complexity, no privileges or user interaction, with high availability and low integrity impact.

Likely exposure

Exposure concerns Linux systems containing the affected MPTCP implementation. The bundle lists 6.0, 6.1.81, 6.6.19, 6.7.7, and 6.8, but does not clearly express version ranges. Confirm distribution backports and whether MPTCP is enabled, used, or network-reachable.

Exploitation context

The source bundle marks this CVE as absent from CISA KEV and provides no evidence of active exploitation or a public exploit. Its CVSS vector describes remote, unauthenticated, low-complexity attack potential, but the supplied description does not document triggering conditions or observed attacks.

Researcher notes

The record is narrowly scoped to a remote_id data race and its ONCE annotations. It does not identify the precise race outcome, affected call paths, triggering prerequisites, or exploit reliability. Version data is ambiguous, so commit-level or distribution-advisory verification is necessary.

Mitigation direction

  • Upgrade to a vendor-supported kernel containing the applicable Linux stable fix.
  • Check distribution security advisories because package versions may include backported fixes.
  • Reduce unnecessary MPTCP exposure until remediation if operationally feasible.
  • Prioritize internet-facing or availability-critical systems after confirming applicability.

Validation and detection

  • Record each system's running kernel and distribution package version.
  • Check package changelogs for CVE-2024-27404 or a referenced stable commit.
  • Confirm whether MPTCP is enabled, used, and reachable in the deployed configuration.
  • Reboot after upgrading and verify the fixed kernel is running.
Prepared
Confidence
medium
Sources
6

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-2024-27404 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
High
CVSS
8.2 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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
5Source 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
8.2CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H3.94.2Linux

Vulnerability scoring details

Base CVSS 3.1 score

8.2High
CVSS 3.1 vector shape for CVE-2024-27404Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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
LinuxLinuxbedee0b561138346967cf1443f2afd1b48b3148f, bedee0b561138346967cf1443f2afd1b48b3148f, bedee0b561138346967cf1443f2afd1b48b3148f, bedee0b561138346967cf1443f2afd1b48b3148funaffected
LinuxLinux6.0, 0, 6.1.81, 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.