External risk intelligence

Linux Kernel TIPC Restricts Socket Queue Dumps in Tracepoints

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-72299

This vulnerability is located deep within the Linux kernel's TIPC (Transparent Inter-Process Communication) protocol implementation, specifically triggered during tracepoint execution for socket queue dumps. It is a highly specialized, internal kernel-level function that is not directly reachable or exposed to the public internet.

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory addresses a resolved vulnerability in the Linux kernel concerning how socket queue information is handled during tracepoint events. While the issue has been fixed, it highlights a potential internal system weakness that could have been exploited under specific, complex conditions within the kernel's TIPC module. The primary concern is to confirm whether this specific kernel component is in use and potentially exposed.

Internal kernel code had a flaw.
This could allow unauthorized access to system data.
Confirm if affected Linux kernel components are in use.

Attack Path

How an attacker could exploit the issue

An attacker could potentially trigger a vulnerability in the Linux kernel's TIPC component by manipulating socket operations. This could allow them to access or modify kernel memory, leading to system instability or compromise.

Requires local access to the system.
Triggered by socket queue dump operations.
Could lead to kernel memory corruption.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could affect system data related to socket queue operations within the Linux kernel's TIPC component when specific tracepoints are triggered. The issue arises from a race condition between the socket owner and the enqueuing process, potentially leading to unexpected behavior or data corruption in the socket's receive queue under certain conditions.

System data in socket queues.
Race condition during tracepoint execution.
Potential for service instability.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability resides within the Linux kernel's TIPC (Transparent Inter-Process Communication) implementation, specifically affecting how socket queue dumps are handled during tracepoint execution. Identifying affected systems requires understanding which infrastructure components utilize TIPC and how these components are exposed. Ownership typically falls to the infrastructure or platform teams responsible for the kernel, with coordination from the security team for risk assessment and remediation planning. The initial practical step is to inventory systems running the affected kernel versions, determine TIPC's usage and reachability, and then engage the accountable team to assess impact and schedule mitigation.

Infrastructure/Platform teams own the issue.
Verify TIPC usage and system reachability.
Plan risk-based remediation activities.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the Linux kernel TIPC component?

TIPC, or Transparent Inter-Process Communication, is a protocol within the Linux kernel designed to allow efficient, reliable communication between different processes or nodes in a cluster. It is primarily used in distributed systems where services need to exchange messages, manage state, or handle service availability across connected hardware or virtualized environments.

What kind of vulnerability is CVE-2026-72299?

This CVE describes a race condition—a type of software flaw where the system's behavior depends on the timing or sequence of uncontrollable events. In this case, a conflict occurs between the process owning a socket and the kernel's internal tracepoint mechanism, which attempts to dump socket queue information simultaneously. This can lead to memory access errors or data corruption within the kernel.

How is this race condition triggered?

The flaw is triggered during specific operations that invoke TIPC tracepoints to dump socket queue data. It is not triggered by standard network traffic alone; rather, it requires complex, concurrent socket activity where an attempt to dump queue data clashes with the socket owner modifying the receive queue. Normal, non-conflicting socket communication does not inherently trigger this issue.

Why does Halo Surface Signal categorize this as unlikely?

Halo Surface Signal flags this as very unlikely because the vulnerability is buried deep within internal kernel-level functions. Because it involves specialized tracepoint execution for the TIPC protocol, it is not a service directly reachable or exposed to the public internet, making it difficult for an attacker to reach the vulnerable code path remotely.

What steps should I take if I run this technology?

Your first step is to inventory your Linux systems to determine if they are running a kernel version containing the affected TIPC module. Since this is an infrastructure-level issue, consult with your platform or kernel engineering teams to verify if TIPC is actively used. If it is, review the provided kernel update references to plan for patching and system maintenance.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.