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CVE Record

CVE-2024-26808: netfilter: nft_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain Remove netdevice from inet/ingress basechain in case NETDEV_UNREGISTER event is reported, otherwise a stale reference to netdevice remains in the hook list.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux kernel netfilter flaw can leave a deleted network device referenced by an ingress filtering chain. A local, low-privileged attacker may be able to trigger unsafe kernel behavior, potentially compromising confidentiality, integrity, and availability. Systems running affected kernels should receive updated vendor kernel packages promptly.

Executive priority

Treat this as a high-priority kernel maintenance issue, especially on shared or locally accessible Linux systems. It is not described as remotely exploitable, and active exploitation is not substantiated. Schedule expedited vendor kernel updates, with normal testing and reboot coordination, rather than emergency internet-wide isolation.

Technical view

When an inet/ingress nftables base chain receives a NETDEV_UNREGISTER event, the vulnerable kernel fails to remove the associated netdevice from its hook list. The resulting stale reference can create unsafe kernel memory behavior. The supplied CVSS 3.1 assessment is 7.8: local access, low complexity, low privileges, no user interaction, and high potential impact.

Likely exposure

Exposure requires an affected Linux kernel and the relevant netfilter inet/ingress base-chain behavior. The bundle identifies affected releases including 5.10, 5.10.210, 5.15.149, 6.1.76, 6.6.15, 6.7.3, and 6.8. Distribution backports may change actual status, so version strings alone are insufficient.

Exploitation context

The supplied CVSS indicates local, low-privileged access rather than remote exploitation. The bundle marks this CVE as absent from KEV and provides no cited evidence of active exploitation or public weaponization. Exploitability details beyond the stale netdevice reference are not established by the supplied sources.

Researcher notes

The central defect is lifecycle handling: NETDEV_UNREGISTER does not remove the netdevice from an inet/ingress base chain's hook list. Multiple stable-kernel commits are supplied, suggesting branch-specific fixes. The affected-version data contains duplicate commit identifiers and ambiguous entries; determine remediation from distribution advisories and package backport records.

Mitigation direction

  • Install a vendor-supported kernel package containing the applicable upstream fix.
  • Check distribution security guidance because vendors may backport fixes without changing major kernel versions.
  • Prioritize multi-user systems where untrusted users can obtain local low-privileged access.
  • Restrict unnecessary local accounts while kernel updates are being validated and deployed.

Validation and detection

  • Inventory running kernel versions across Linux hosts and compare them with vendor advisories.
  • Verify installed kernel package changelogs identify CVE-2024-26808 or the applicable upstream fix.
  • Confirm hosts rebooted into the remediated kernel after package installation.
  • Review relevant nftables configurations for inet ingress base chains when prioritizing exposure.
  • Re-scan deployed hosts after remediation and investigate remaining affected-version findings.
Prepared
Confidence
high
Sources
9

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-2024-26808 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

2CVSS vectors
3Timeline events
2ADP providers
8Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-26808Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux60a3815da702fd9e4759945f26cce5c47d3967ad, 60a3815da702fd9e4759945f26cce5c47d3967ad, 60a3815da702fd9e4759945f26cce5c47d3967ad, 60a3815da702fd9e4759945f26cce5c47d3967ad, 60a3815da702fd9e4759945f26cce5c47d3967ad, 60a3815da702fd9e4759945f26cce5c47d3967adunaffected
LinuxLinux5.10, 0, 5.10.210, 5.15.149, 6.1.76, 6.6.15, 6.7.3, 6.8affected
Weakness

CWE details

No CWE listed

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