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CVE Record

CVE-2025-22110: netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error It is possible that ctx in nfqnl_build_packet_message() could be used before it is properly initialize, which is only initialized by nfqnl_get_sk_secctx(). This patch corrects this problem by initializing the lsmctx to a safe value when it is declared. This is similar to the commit 35fcac7a7c25 ("audit: Initialize lsmctx to avoid memory allocation error").

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A Linux kernel networking component can use security-context data before it is safely initialized while building queued packet messages. The supplied record rates this critical, but it does not demonstrate a path to system compromise. The kernel fix initializes the data to a safe value, preventing the reported memory-allocation error.

Executive priority

Begin an urgent kernel patching review because the published rating is critical. Do not claim an active attack campaign; none is evidenced here. Identify matching kernels, verify vendor backports, and schedule updates according to system exposure and business importance.

Technical view

In nfqnl_build_packet_message(), ctx may be consumed before nfqnl_get_sk_secctx() initializes it. The referenced stable-kernel patches initialize lsmctx at declaration. The record assigns CVSS 3.1 9.8, although the supplied technical description does not substantiate the vector’s stated remote reachability and full confidentiality, integrity, and availability impacts.

Likely exposure

Potential exposure concerns Linux kernels covered by the record’s affected 6.14, 6.14.2, and 6.15 version data, subject to distribution backports. The supplied encoding does not establish precise inclusive boundaries. Systems exercising nfnetlink_queue packet-message construction are most relevant; configuration and reachability prerequisites are not documented.

Exploitation context

KEV is false, and no supplied source reports active exploitation or a public proof of concept. The CVSS vector describes remote, unauthenticated exploitation, but the technical references document only the uninitialized context and its fix. Practical exploitability and impact remain unconfirmed from this bundle.

Researcher notes

The core defect and remediation are supported by Linux stable commits. However, the bundle lacks a CWE, crash trace, exploit demonstration, detailed trigger conditions, and clear version-range semantics. CVSS 9.8 appears materially stronger than the narrow technical description, so researchers should validate impact rather than assume full remote compromise.

Mitigation direction

  • Install a vendor kernel containing the referenced stable fix.
  • Check distribution advisories for exact fixed package versions and backport status.
  • Prioritize matching hosts that use nfnetlink_queue or perform sensitive network filtering.
  • If updates are unavailable, follow vendor guidance; the bundle names no separate workaround.

Validation and detection

  • Inventory running kernel and installed kernel package versions across Linux systems.
  • Compare builds against distribution advisories and the CVE affected-version record.
  • Confirm vendor changelogs or kernel sources include safe lsmctx initialization or a referenced fix.
  • After updating, confirm the patched kernel is active following any required reboot.
Prepared
Confidence
medium
Sources
4

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-2025-22110 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
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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
0ADP providers
3Source links

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
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2025-22110Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux2d470c778120d3cdb8d8ab250329ca85f49f12b1, 2d470c778120d3cdb8d8ab250329ca85f49f12b1unaffected
LinuxLinux6.14, 0, 6.14.2, 6.15affected
Weakness

CWE details

No CWE listed

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