LiveActive security incident?Get immediate response
CVE Record

CVE-2024-35867: smb: client: fix potential UAF in cifs_stats_proc_show()

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in cifs_stats_proc_show() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.

HighCVSS 7.8Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A local user may trigger a race in the Linux SMB/CIFS client while statistics are read and a session is shutting down. The resulting use-after-free could crash the system or potentially affect data confidentiality and integrity. Network exposure alone is not sufficient according to the supplied CVSS vector.

Executive priority

Treat as a high-priority kernel maintenance issue for shared Linux systems using SMB/CIFS. Accelerate remediation where untrusted users have local accounts. For single-purpose systems without local user access or CIFS use, validate applicability before emergency action.

Technical view

cifs_stats_proc_show() could access an SMB session during teardown, after its memory became invalid. The kernel fix skips sessions marked SES_EXITING. CVSS 3.1 rates this 7.8: local access, low complexity, low privileges, no user interaction, and potentially high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is most plausible on affected Linux kernels using the SMB/CIFS client, where a low-privileged local user can access the relevant statistics interface while sessions are being torn down. The supplied version data is ambiguous, so verify distribution backports rather than relying only on kernel version strings.

Exploitation context

The supplied record does not identify active exploitation, and the CVE is not listed as KEV in the bundle. No public exploit evidence is provided. Exploitation requires local, low-privileged access according to the CVSS vector, reducing immediate internet-facing risk but remaining important on shared or multi-user systems.

Researcher notes

The core condition is a teardown race involving cifs_stats_proc_show() and a session marked SES_EXITING. The correction avoids traversing exiting sessions. The bundle provides multiple stable-kernel commits but insufficient version-range semantics to map every release reliably; downstream package status should be considered authoritative for deployed distributions.

Mitigation direction

  • Upgrade to a distribution-supported kernel containing the upstream fix or an equivalent backport.
  • Check vendor advisories because package versions may differ from upstream kernel version numbers.
  • Prioritize shared systems that use SMB/CIFS and permit untrusted local users.
  • If immediate upgrading is impossible, assess whether SMB/CIFS client use can be safely reduced.

Validation and detection

  • Inventory kernel versions and distribution package revisions across Linux systems.
  • Confirm whether the SMB/CIFS client is installed, loaded, or actively used.
  • Verify vendor changelogs or source patches include the SES_EXITING session check.
  • Reassess systems after rebooting into the corrected kernel.
  • Confirm vulnerability scanners recognize distribution backports to avoid false positives.
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

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

cve · low confidence lookup

CVE-2024-35867 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/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
8Source 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
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-35867Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/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
LinuxLinux7f48558e6489d032b1584b0cc9ac4bb11072c034, 7f48558e6489d032b1584b0cc9ac4bb11072c034, 7f48558e6489d032b1584b0cc9ac4bb11072c034, 7f48558e6489d032b1584b0cc9ac4bb11072c034, 7f48558e6489d032b1584b0cc9ac4bb11072c034, 7f48558e6489d032b1584b0cc9ac4bb11072c034, a67172a013953664b1dad03c648200c70b90506c, 3.12.48unaffected
LinuxLinux3.13, 0, 5.10.237, 5.15.181, 6.1.85, 6.6.26, 6.8.5, 6.9affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.