CVE-2025-71096
Description
An uninitialized memory read flaw was found in the Linux kernel's RDMA netlink subsystem. When processing IP resolution responses (RDMA_NL_LS_OP_IP_RESOLVE), the code did not properly validate that the required LS_NLA_TYPE_DGID attribute was present. A malformed userspace netlink message missing this attribute causes the kernel to read uninitialized stack data, which is then printed to kernel logs.
Statement
Exploitation requires the ability to send RDMA netlink messages, which typically requires root or CAP_NET_ADMIN capability. The information leaked is limited to uninitialized stack contents printed in kernel logs as an IPv6 address. Systems without RDMA/InfiniBand hardware or configuration are not affected.
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 | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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