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CVE Record

CVE-2024-26594: ksmbd: validate mech token in session setup

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate mech token in session setup If client send invalid mech token in session setup request, ksmbd validate and make the error if it is invalid.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-26594 is a Linux kernel ksmbd issue where session setup did not properly validate a client-supplied mechanism token. The public record does not provide impact, CVSS, or CWE details, so business urgency depends on whether in-kernel SMB service is enabled and exposed.

Executive priority

Prioritize review for Linux file-sharing servers using ksmbd. With no CVSS or exploitation evidence in the supplied sources, this is not enough alone for emergency action, but internet-exposed SMB should be remediated promptly.

Technical view

The resolved kernel change validates the mech token during ksmbd session setup and returns an error when it is invalid. The source lists Linux kernel versions and multiple stable commit references, but does not describe confidentiality, integrity, availability impact, or a practical exploit condition.

Likely exposure

Exposure is most plausible on Linux systems running ksmbd, the in-kernel SMB server, especially where SMB is reachable by untrusted clients. Systems not using ksmbd are less likely to be affected based on the described component.

Exploitation context

The source bundle does not show CISA KEV listing, active exploitation, public exploit details, or weaponized use. Treat this as a kernel service input-validation flaw with incomplete public impact evidence.

Researcher notes

Key gaps are impact semantics and affected-version precision. The record states invalid mech token handling during session setup and references stable commits. Further analysis should focus on the ksmbd session setup path and vendor backport status, without assuming exploitability.

Mitigation direction

  • Identify Linux systems running ksmbd or offering SMB through the kernel server.
  • Apply vendor kernel updates containing the referenced stable ksmbd fix.
  • Check distribution advisories for exact fixed package versions.
  • Restrict SMB exposure to trusted networks where operationally possible.
  • Track whether your vendor assigns severity or backports the fix.

Validation and detection

  • Inventory kernels and confirm whether ksmbd is enabled.
  • Map running kernel versions against vendor advisory fixed versions.
  • Review SMB service exposure from network and firewall records.
  • Confirm updated kernels include the referenced ksmbd validation commit.
  • Document systems where ksmbd is absent or disabled.
Prepared
Confidence
medium
Sources
7

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2024-26594 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
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
3Timeline events
2ADP providers
6Source links

SSVC decision data

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

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
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf, 0626e6641f6b467447c81dd7678a69c66f7746cf, 0626e6641f6b467447c81dd7678a69c66f7746cf, 0626e6641f6b467447c81dd7678a69c66f7746cf, 0626e6641f6b467447c81dd7678a69c66f7746cfunaffected
LinuxLinux5.15, 0, 5.15.149, 6.1.75, 6.6.14, 6.7.2, 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.