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CVE Record

CVE-2024-38564: bpf: Add BPF_PROG_TYPE_CGROUP_SKB attach type enforcement in BPF_LINK_CREATE

In the Linux kernel, the following vulnerability has been resolved: bpf: Add BPF_PROG_TYPE_CGROUP_SKB attach type enforcement in BPF_LINK_CREATE bpf_prog_attach uses attach_type_to_prog_type to enforce proper attach type for BPF_PROG_TYPE_CGROUP_SKB. link_create uses bpf_prog_get and relies on bpf_prog_attach_check_attach_type to properly verify prog_type <> attach_type association. Add missing attach_type enforcement for the link_create case. Otherwise, it's currently possible to attach cgroup_skb prog types to other cgroup hooks.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Linux fixed a kernel BPF validation gap. A program type meant for cgroup network packet hooks could be attached to other cgroup hooks through BPF_LINK_CREATE. The public record does not describe observed exploitation, a CVSS score, or concrete business impact, so urgency depends on BPF exposure and kernel update status.

Executive priority

Track and patch through the normal kernel update process, with higher priority for shared compute, container hosts, and systems that intentionally use BPF. Current public evidence does not support emergency handling by itself.

Technical view

CVE-2024-38564 adds missing attach-type enforcement for BPF_PROG_TYPE_CGROUP_SKB in the BPF_LINK_CREATE path. The source says bpf_prog_attach already enforced the prog_type-to-attach_type relationship, but link_create relied on checks that did not prevent cgroup_skb programs from attaching to other cgroup hooks.

Likely exposure

Exposure is Linux-kernel specific. The bundle lists Linux kernel versions and stable commits, but does not map affected distro packages. Systems where workloads can create BPF links or use cgroup BPF functionality deserve earlier review, especially shared or multi-tenant hosts.

Exploitation context

The provided sources do not report active exploitation, public exploit use, or KEV listing. They also do not state required privileges or full impact. Treat exploitation status as unconfirmed and avoid assuming remote reachability from the available evidence.

Researcher notes

The key behavior is missing attach-type validation in BPF_LINK_CREATE, not bpf_prog_attach. Validate by reviewing kernel lineage and the presence of the stable commits. The source bundle does not provide impact classification, CWE, CVSS, exploitability prerequisites, or distro backport details.

Mitigation direction

  • Update to a vendor kernel containing the referenced stable fixes.
  • Check Linux distribution advisories for package-specific fixed versions.
  • Prioritize shared systems that expose BPF or cgroup functionality to workloads.
  • Restrict unnecessary BPF capability exposure according to existing hardening policy.

Validation and detection

  • Inventory Linux kernel versions across servers, containers hosts, and appliances.
  • Compare installed kernels with vendor advisories for CVE-2024-38564.
  • Confirm whether BPF and cgroup BPF features are available to workloads.
  • Verify patched hosts are booted into the updated kernel.
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

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CVE-2024-38564 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
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

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux4a1e7c0c63e02daad751842b7880f9bbcdfb6e89, 4a1e7c0c63e02daad751842b7880f9bbcdfb6e89, 4a1e7c0c63e02daad751842b7880f9bbcdfb6e89, 4a1e7c0c63e02daad751842b7880f9bbcdfb6e89unaffected
LinuxLinux5.10, 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.