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CVE Record

CVE-2024-26925: netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path The commit mutex should not be released during the critical section between nft_gc_seq_begin() and nft_gc_seq_end(), otherwise, async GC worker could collect expired objects and get the released commit lock within the same GC sequence. nf_tables_module_autoload() temporarily releases the mutex to load module dependencies, then it goes back to replay the transaction again. Move it at the end of the abort phase after nft_gc_seq_end() is called.

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 locking flaw in the nftables firewall subsystem can create unsafe memory handling during a failed transaction. A locally authenticated, low-privileged attacker may be able to compromise confidentiality, integrity, and availability. Network access alone is insufficient according to the supplied CVSS vector.

Executive priority

Treat as a high-priority local privilege risk, especially on shared Linux servers, appliances, and systems running untrusted workloads. Patch through normal emergency or accelerated kernel maintenance processes. Internet exposure alone does not establish exploitability, but local footholds could increase business impact.

Technical view

The nf_tables abort path released the commit mutex before nft_gc_seq_end(). An asynchronous garbage-collection worker could then collect expired objects and acquire that lock within the same garbage-collection sequence. The kernel fix moves the mutex release until after nft_gc_seq_end(), preserving the intended critical section.

Likely exposure

Exposure is limited to Linux systems containing an affected kernel implementation and permitting a low-privileged local user to reach the vulnerable nftables transaction path. The supplied version data is complex and includes backported commits, so assess distribution kernels using vendor advisories and package changelogs rather than version numbers alone.

Exploitation context

The supplied CVSS 3.1 score is 7.8: local access, low complexity, low privileges, no user interaction, and potentially high impact across confidentiality, integrity, and availability. The source bundle states KEV is false and provides no evidence of active exploitation or a public exploit.

Researcher notes

The defect is a concurrency and critical-section ordering error involving the nf_tables commit mutex, abort replay, module autoloading, and asynchronous garbage collection. The bundle does not assign a CWE or describe a demonstrated exploitation primitive. Validate fixes by commit ancestry or distribution backport records; do not infer safety solely from the displayed release number.

Mitigation direction

  • Install the corrected kernel package supplied by your Linux distribution or device vendor.
  • Reboot into the updated kernel after installation so the running system receives the fix.
  • Prioritize multi-user systems where untrusted or low-privileged users receive local access.
  • If updates are unavailable, check vendor guidance for supported temporary mitigations.

Validation and detection

  • Record both the installed kernel package and the currently running kernel version.
  • Confirm the running kernel includes the applicable vendor backport or referenced upstream fix.
  • Review vendor advisories because distribution version strings may not match upstream versions directly.
  • Verify the host rebooted into the corrected kernel after package installation.
  • Confirm nftables exposure and local-user access assumptions during asset triage.
Prepared
Confidence
high
Sources
5

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-2024-26925 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
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.

1CVSS vectors
3Timeline events
3ADP providers
11Source links

SSVC decision data

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

CVSS vector scores

1 official score

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

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-26925Attack 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
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux4b6346dc1edfb9839d6edee7360ed31a22fa6c95, 23292bdfda5f04e704a843b8f97b0eb95ace1ca6, b44a459c6561595ed7c3679599c5279204132b33, 5d319f7a81431c6bb32eb4dc7d7975f99e2c8c66, 720344340fb9be2765bbaab7b292ece0a4570eae, 720344340fb9be2765bbaab7b292ece0a4570eae, 720344340fb9be2765bbaab7b292ece0a4570eae, f85ca36090cbb252bcbc95fc74c2853fc792694f, e07e68823116563bdbc49cef185cda6f463bc534, 5.4.262, 5.10.198, 5.15.134, 6.1.56, 4.19.316, 6.4.13unaffected
LinuxLinux6.5, 0, 5.4.274, 5.10.215, 5.15.155, 6.1.86, 6.6.26, 6.8.5, 6.9affected
Weakness

CWE details

No CWE listed

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