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CVE Record

CVE-2024-50185: mptcp: handle consistently DSS corruption

In the Linux kernel, the following vulnerability has been resolved: mptcp: handle consistently DSS corruption Bugged peer implementation can send corrupted DSS options, consistently hitting a few warning in the data path. Use DEBUG_NET assertions, to avoid the splat on some builds and handle consistently the error, dumping related MIBs and performing fallback and/or reset according to the subflow type.

HighCVSS 8.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A remote MPTCP peer can send corrupted Data Sequence Signal options that Linux handles inconsistently, potentially causing serious service disruption and limited data-integrity effects. Systems not using MPTCP are less likely to be exposed. Linux stable fixes change the failure path to controlled fallback or reset behavior.

Executive priority

Treat this as a high-priority kernel maintenance issue for internet-facing or availability-sensitive systems using MPTCP. Expedite vendor-backed updates after compatibility testing. Systems that do not enable or negotiate MPTCP can receive lower operational priority, but should still be inventoried because kernel configuration and distribution backports vary.

Technical view

CVE-2024-50185 affects Linux kernel MPTCP processing of corrupted DSS options. Crafted or faulty peer traffic can repeatedly reach warning paths in the data plane. The fix replaces certain warnings with DEBUG_NET assertions, records relevant MIB counters, and consistently performs fallback or subflow reset. The supplied CVSS 3.1 score is 8.2.

Likely exposure

Exposure is most likely where affected Linux kernels enable and actively negotiate MPTCP with external or untrusted peers. The bundle identifies Linux 5.7 and later stable-series versions, but its normalized version list is ambiguous. Confirm distribution backports using CVE and commit references rather than version strings alone.

Exploitation context

The CVSS vector indicates network reachability without privileges or user interaction, with high availability and low integrity impact. The supplied record is not in KEV, and the source bundle provides no evidence of active exploitation or a public exploit.

Researcher notes

The source description attributes the condition to corrupted DSS options from a bugged peer and emphasizes warning suppression plus consistent fallback or reset. It does not document demonstrated code execution, confidentiality loss, active exploitation, or a specific CWE. Exact affected-range interpretation remains uncertain from the normalized version array.

Mitigation direction

  • Update to a vendor-supported kernel containing the applicable referenced Linux stable fix.
  • Check distribution advisories and package changelogs for CVE-2024-50185 backports.
  • Until updated, follow vendor guidance for reducing MPTCP exposure; no bundle-sourced workaround is specified.
  • Prioritize externally reachable systems that actively use MPTCP.

Validation and detection

  • Inventory running kernel and distribution package versions on systems capable of using MPTCP.
  • Verify installed kernel changelogs include CVE-2024-50185 or the applicable stable fix commit.
  • Determine whether MPTCP is enabled and negotiated with external or untrusted peers.
  • Review kernel logs for repeated MPTCP DSS warnings; their absence does not prove safety.
  • Run vendor-approved MPTCP regression tests after updating and confirm stable operation.
Prepared
Confidence
medium
Sources
8

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.

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CVE-2024-50185 mapping review

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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.

2CVSS vectors
3Timeline events
2ADP providers
9Source links

SSVC decision data

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

CVSS vector scores

2 official scores

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
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

8.2High
CVSS 3.1 vector shape for CVE-2024-50185Attack 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
cvssV3_1other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux6771bfd9ee2460c13e38c0cd46a3afb5404ae716, 6771bfd9ee2460c13e38c0cd46a3afb5404ae716, 6771bfd9ee2460c13e38c0cd46a3afb5404ae716, 6771bfd9ee2460c13e38c0cd46a3afb5404ae716, 6771bfd9ee2460c13e38c0cd46a3afb5404ae716, 6771bfd9ee2460c13e38c0cd46a3afb5404ae716unaffected
LinuxLinux5.7, 0, 5.10.228, 5.15.169, 6.1.113, 6.6.57, 6.11.4, 6.12affected
Weakness

CWE details

No CWE listed

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