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CVE Record

CVE-2024-26822: smb: client: set correct id, uid and cruid for multiuser automounts

In the Linux kernel, the following vulnerability has been resolved: smb: client: set correct id, uid and cruid for multiuser automounts When uid, gid and cruid are not specified, we need to dynamically set them into the filesystem context used for automounting otherwise they'll end up reusing the values from the parent mount.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

A Linux kernel SMB client bug can apply the wrong user identity values to multiuser automounted SMB shares when uid, gid, and cruid are omitted. The business concern is incorrect identity handling on Linux systems that mount SMB shares. The sources do not provide CVSS, confirmed impact, or active exploitation evidence.

Executive priority

Track this as a targeted Linux infrastructure hygiene item, not an emergency, unless your environment relies heavily on multiuser SMB automounts. Prioritize patching affected file-sharing clients during normal kernel maintenance after confirming vendor applicability.

Technical view

The flaw is in Linux kernel SMB client automount handling. For multiuser automounts, the filesystem context should dynamically set id, uid, and cruid; otherwise automounts can reuse values from the parent mount. Kernel stable commits are referenced as fixes, but the source bundle does not define a CWE or CVSS score.

Likely exposure

Exposure is most likely on Linux systems using the kernel SMB/CIFS client with multiuser automounts, especially configurations omitting uid, gid, and cruid. Downstream distribution exposure depends on kernel packaging and backports, so version strings alone may be insufficient.

Exploitation context

The source bundle marks KEV as false and provides no cited evidence of active exploitation or public weaponization. It describes a resolved kernel behavior issue, not an exploit chain. Treat exploitation status as unconfirmed unless a vendor or CISA source says otherwise.

Researcher notes

Evidence is limited to the CVE record and Linux stable commit references. The likely security relevance is identity or credential-context confusion in SMB multiuser automounts, but the bundle does not state confidentiality, integrity, or privilege impact. Avoid overstating severity without vendor scoring.

Mitigation direction

  • Check Linux vendor advisories for CVE-2024-26822 and apply the appropriate kernel update.
  • Prioritize systems using SMB/CIFS multiuser automounts over systems without SMB client mounts.
  • Review automount configurations that omit uid, gid, or cruid.
  • Use vendor-supported mitigations if patching is delayed; none are specified in the source bundle.

Validation and detection

  • Inventory Linux hosts using SMB/CIFS client mounts and automounts.
  • Identify multiuser automounts where uid, gid, or cruid are not explicitly configured.
  • Compare deployed kernels with vendor fixed packages or the referenced stable commits.
  • Confirm no vulnerable kernel packages remain after patch deployment.
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

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CVE-2024-26822 mapping review

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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
LinuxLinuxc8117ac42303f7ae99bbe53e4952f7d147cca1fb, 60e3318e3e900ba1ddfead937012b3432dfccc92, 9fd29a5bae6e8f94b410374099a6fddb253d2d5f, 9fd29a5bae6e8f94b410374099a6fddb253d2d5f, 9fd29a5bae6e8f94b410374099a6fddb253d2d5f, 5.15.124, 6.1.54unaffected
LinuxLinux6.2, 0, 5.15.201, 6.1.164, 6.6.18, 6.7.6, 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.