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CVE Record

CVE-2024-26642: netfilter: nf_tables: disallow anonymous set with timeout flag

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: disallow anonymous set with timeout flag Anonymous sets are never used with timeout from userspace, reject this. Exception to this rule is NFT_SET_EVAL to ensure legacy meters still work.

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 issue affects nf_tables, the packet-filtering subsystem behind nftables. The fix blocks an unsupported anonymous-set timeout combination from userspace, except for legacy meter compatibility. Business urgency depends on exposed Linux kernel versions and vendor backports; the supplied sources do not state impact, CVSS, or active exploitation.

Executive priority

Track and patch through normal kernel security maintenance unless local exposure is unusually high. Escalate if critical Linux infrastructure cannot be updated or if vendor advisories later assign concrete impact or exploitation evidence.

Technical view

CVE-2024-26642 resolves nf_tables behavior by rejecting anonymous sets with NFT_SET_TIMEOUT from userspace, while preserving NFT_SET_EVAL for legacy meters. The CVE lists Linux kernel versions from 4.1 through 6.8 as affected and references stable kernel fixes. Specific exploitability, required privileges, and security impact are not described in the source bundle.

Likely exposure

Linux systems running affected or unpatched kernels may be exposed, especially hosts using nftables/netfilter functionality. Distribution kernels may be fixed through backports even when version strings appear older, so validation must use vendor package advisories and changelogs.

Exploitation context

The bundle does not identify public exploitation, KEV listing, exploit code, required local access, or attacker prerequisites. Treat this as a kernel maintenance vulnerability until vendor advisories provide clearer impact or exploitability detail.

Researcher notes

The source bundle is sparse: no CVSS, CWE, exploit status, or detailed impact is provided. Analysis should stay close to the kernel fix: userspace anonymous sets with timeout are rejected, with NFT_SET_EVAL retained for legacy meters.

Mitigation direction

  • Update affected Linux kernels to vendor releases containing the referenced nf_tables fix.
  • Apply Debian LTS kernel updates where Debian advisories match your deployed release.
  • Check appliance and embedded Linux vendor advisories for backported fixes.
  • Prioritize systems where untrusted users can influence firewall or nftables configuration.

Validation and detection

  • Inventory Linux kernel versions and distribution package revisions across servers and appliances.
  • Confirm whether the referenced stable fix is present in vendor kernel changelogs.
  • Review Debian LTS advisories if running Debian-based long-term support systems.
  • Document any systems using nftables/netfilter and their patch status.
Prepared
Confidence
medium
Sources
12

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-2024-26642 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
3ADP providers
12Source 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
LinuxLinux761da2935d6e18d178582dbdf315a3a458555505, 761da2935d6e18d178582dbdf315a3a458555505, 761da2935d6e18d178582dbdf315a3a458555505, 761da2935d6e18d178582dbdf315a3a458555505, 761da2935d6e18d178582dbdf315a3a458555505, 761da2935d6e18d178582dbdf315a3a458555505, 761da2935d6e18d178582dbdf315a3a458555505, 761da2935d6e18d178582dbdf315a3a458555505unaffected
LinuxLinux4.1, 0, 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8affected
Weakness

CWE details

No CWE listed

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