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CVE Record

CVE-2024-38566: bpf: Fix verifier assumptions about socket->sk

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix verifier assumptions about socket->sk The verifier assumes that 'sk' field in 'struct socket' is valid and non-NULL when 'socket' pointer itself is trusted and non-NULL. That may not be the case when socket was just created and passed to LSM socket_accept hook. Fix this verifier assumption and adjust tests.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel flaw involves a mistaken eBPF verifier assumption about newly accepted sockets. The sources do not provide CVSS, business impact, or exploitation evidence. Treat it as a kernel maintenance risk where affected systems should receive the relevant stable kernel updates.

Executive priority

Track this as a kernel patching item rather than an emergency unless vendor guidance adds severity or exploitation evidence. Prioritize normal expedited maintenance for exposed or multi-tenant Linux infrastructure.

Technical view

The eBPF verifier assumed struct socket->sk was valid and non-NULL when the socket pointer was trusted. The CVE states this can be false for a socket just created and passed to the LSM socket_accept hook. Kernel stable commits correct the verifier assumption and adjust tests.

Likely exposure

Exposure is most plausible on Linux systems running affected kernel versions with eBPF and LSM socket_accept hook paths available. The source bundle identifies Linux kernel version ranges beginning at 6.4 and fixed through listed stable commits, but gives no distribution package mapping.

Exploitation context

CISA KEV is false in the provided bundle, and no cited source states active exploitation or public exploitation. The sources also do not describe prerequisites, exploit reliability, or required privileges, so practical exploitability remains unclear from this evidence.

Researcher notes

Evidence is limited to the Linux CVE description and stable commit references. Focus review on verifier treatment of socket->sk in LSM socket_accept contexts and downstream kernel backports. Do not assume impact class beyond the provided verifier flaw.

Mitigation direction

  • Update affected Linux kernels to builds containing the referenced stable fixes.
  • Use distribution vendor advisories to map fixed kernel packages to deployed systems.
  • Prioritize internet-facing, multi-tenant, container-hosting, and developer systems using recent kernels.
  • If immediate patching is delayed, review vendor guidance for temporary risk reduction.

Validation and detection

  • Inventory Linux kernel versions across servers, containers hosts, and appliances.
  • Map running kernels against vendor advisories for CVE-2024-38566.
  • Confirm deployed kernel builds include the referenced stable commits or downstream backports.
  • Review eBPF and LSM usage where operationally relevant.
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-2024-38566 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
5Source 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux6fcd486b3a0a628c41f12b3a7329a18a2c74b351, 6fcd486b3a0a628c41f12b3a7329a18a2c74b351, 6fcd486b3a0a628c41f12b3a7329a18a2c74b351, 6fcd486b3a0a628c41f12b3a7329a18a2c74b351unaffected
LinuxLinux6.4, 0, 6.6.33, 6.8.12, 6.9.3, 6.10affected
Weakness

CWE details

No CWE listed

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