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CVE Record

CVE-2024-26835: netfilter: nf_tables: set dormant flag on hook register failure

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: set dormant flag on hook register failure We need to set the dormant flag again if we fail to register the hooks. During memory pressure hook registration can fail and we end up with a table marked as active but no registered hooks. On table/base chain deletion, nf_tables will attempt to unregister the hook again which yields a warn splat from the nftables core.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-26835 is a Linux kernel nftables issue. Under memory pressure, hook registration can fail and leave a firewall table marked active even though hooks were not registered. Later deletion can trigger a kernel warning. The sources do not provide CVSS, CWE, or evidence of active exploitation.

Executive priority

Treat this as routine kernel maintenance unless internal evidence shows repeated nftables warnings or affected firewall hosts are highly critical. Prioritize normal patch windows and confirm vendor coverage rather than emergency response.

Technical view

In nf_tables, failed hook registration did not restore the table dormant flag. This creates inconsistent state: active table metadata without registered hooks. When the table or base chain is deleted, nftables attempts to unregister hooks again, producing a warning from nftables core. Stable kernel commits address the state-handling defect.

Likely exposure

Exposure is likely limited to Linux systems running affected kernel builds with nftables/netfilter functionality present. Actual exposure depends on distribution backports and kernel package status, not only upstream version numbers. Debian LTS published related kernel updates in June 2024.

Exploitation context

The source bundle marks KEV as false and cites no public active exploitation. The described trigger requires memory pressure and a hook-registration failure, but the sources do not document exploitability beyond the kernel warning condition.

Researcher notes

Evidence is limited to the CVE text, stable kernel commits, and Debian LTS notice. No CVSS, CWE, exploit status, or practical attack path is provided. Prefer patch-state validation over reproducing the memory-pressure failure path.

Mitigation direction

  • Apply vendor kernel updates that include the listed stable kernel fixes.
  • For custom kernels, review and incorporate the referenced upstream stable commits.
  • Check Debian LTS advisory applicability for Debian long-term-support systems.
  • Track vendor advisories if your distribution backports fixes without changing major kernel versions.

Validation and detection

  • Inventory Linux kernel versions and distribution package build numbers.
  • Confirm vendor advisories or changelogs mention CVE-2024-26835 or the referenced commits.
  • Identify systems using nftables or netfilter-heavy firewall configurations.
  • Review kernel logs for nftables warning patterns, without attempting to trigger the condition.
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-2024-26835 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
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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxbf8083bbf8fa202e6e5316bbd99759ab82bfe7a3, e10f661adc556c4969c70ddaddf238bffdaf1e87, d9c4da8cb74e8ee6e58a064a3573aa37acf6c935, 179d9ba5559a756f4322583388b3213fe4e391b0, 179d9ba5559a756f4322583388b3213fe4e391b0, 179d9ba5559a756f4322583388b3213fe4e391b0, 179d9ba5559a756f4322583388b3213fe4e391b0, 179d9ba5559a756f4322583388b3213fe4e391b0, 5.4.262, 5.10.202unaffected
LinuxLinux5.13, 0, 5.4.270, 5.10.211, 5.15.150, 6.1.80, 6.6.19, 6.7.7, 6.8affected
Weakness

CWE details

No CWE listed

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