CVE-2026-68289
Description
A flaw was found in the Linux kernel. An integer overflow vulnerability exists within the Transparent Inter-Process Communication (TIPC) subsystem, specifically in the tipc_recvmsg() and tipc_recvstream() functions. This issue occurs when a buffer length value exceeds the maximum integer size, leading to a negative copy length. A local attacker could exploit this flaw to trigger a kernel panic, resulting in a Denial of Service (DoS) for the system.
Statement
This vulnerability is rated as Moderate impact because exploitation requires local access and the Transparent Inter-Process Communication (TIPC) kernel module is not loaded by default on Red Hat Enterprise Linux. An unprivileged local user could potentially cause a denial of service by triggering a kernel crash when receiving data over TIPC sockets with oversized buffer lengths. Standard deployments that do not explicitly enable or configure TIPC networking are not exposed to this risk.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | High | N/A | N/A |
| Integrity Impact | High | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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