CVE-2026-72130
Description
A flaw was found in the nvmet-auth component of the Linux kernel. A remote attacker, by sending a specially crafted AUTH_RECEIVE buffer to an NVMe-oF (NVM Express over Fabrics) target with in-band authentication enabled, can trigger a heap out-of-bounds write. This vulnerability arises because the system incorrectly processes the provided buffer length, leading to memory corruption. This can result in a denial of service or other unpredictable system behavior.
Mitigation
To mitigate this issue, ensure that in-band DH-HMAC-CHAP authentication is not configured on NVMe-oF targets if it is not strictly required. This vulnerability is only exploitable when this specific authentication mechanism is enabled. Consult NVMe-oF documentation for your specific setup to disable DH-HMAC-CHAP authentication if it is currently enabled and not required.
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 | 8.8 | N/A | 9.8 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
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