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CVE Record

CVE-2024-45018: netfilter: flowtable: initialise extack before use

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: initialise extack before use Fix missing initialisation of extack in flow offload.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-45018 is a Linux kernel netfilter issue in flow offload handling. The public record says an extack structure was used without proper initialization. Impact details, CVSS score, and CWE are not provided, so business urgency should be based on where affected Linux kernels are exposed and vendor patch availability.

Executive priority

Treat this as a kernel hygiene item with uncertain severity. Prioritize patching exposed network-processing systems and vendor-managed appliances, but do not treat it as an emergency without additional impact or exploitation evidence.

Technical view

The issue is in the Linux kernel netfilter flowtable code: flow offload did not initialize extack before use. Upstream stable commits address the defect across maintained kernel branches. The bundle does not describe reachable attack paths, privilege requirements, crash behavior, data exposure, or integrity impact.

Likely exposure

Exposure is likely limited to systems running affected Linux kernels with netfilter flowtable or flow offload functionality present. Debian LTS and Siemens advisories show downstream tracking, but the bundle does not prove exposure for every Linux deployment or appliance.

Exploitation context

No active exploitation is supported by the provided sources. The CVE is not marked KEV, and the bundle provides no public exploit status, exploitation narrative, or attack preconditions beyond the kernel component involved.

Researcher notes

Evidence is sparse: the record identifies a missing extack initialization in netfilter flow offload and points to stable commits. It does not include CVSS, CWE, repro details, exploitability analysis, or operational impact. Avoid inferring memory corruption or denial-of-service without more source evidence.

Mitigation direction

  • Identify Linux kernel versions across servers, appliances, containers hosts, and network devices.
  • Apply vendor kernel updates that include the referenced upstream stable fixes.
  • Review Debian LTS and Siemens guidance if those ecosystems are used.
  • Prioritize internet-facing or network-processing Linux systems first.
  • If no package is available, follow vendor guidance for temporary risk reduction.

Validation and detection

  • Confirm running kernel versions against vendor advisories and fixed package notes.
  • Check whether netfilter flowtable or flow offload is enabled or used.
  • Verify kernel update installation and reboot into the patched kernel.
  • Track vendor advisories for appliance-specific affected versions and remediations.
Prepared
Confidence
medium
Sources
11

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-2024-45018 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
3ADP providers
10Source 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
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxc29f74e0df7a02b8303bcdce93a7c0132d62577a, c29f74e0df7a02b8303bcdce93a7c0132d62577a, c29f74e0df7a02b8303bcdce93a7c0132d62577a, c29f74e0df7a02b8303bcdce93a7c0132d62577a, c29f74e0df7a02b8303bcdce93a7c0132d62577a, c29f74e0df7a02b8303bcdce93a7c0132d62577aunaffected
LinuxLinux5.5, 0, 5.10.225, 5.15.166, 6.1.107, 6.6.48, 6.10.7, 6.11affected
Weakness

CWE details

No CWE listed

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