CVE-2026-72294
Description
A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) component, specifically within the LoongArch architecture. The kvm_vcpu_ioctl_interrupt() function, which can be invoked from userspace, lacks proper validation of interrupt requests. This missing validity check could allow a local attacker to trigger an invalid interrupt, potentially leading to a denial of service.
Statement
A moderate severity flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) support for the LoongArch architecture. The kvm_vcpu_ioctl_interrupt() function, which can be invoked from userspace, did not validate the interrupt request passed to it, allowing a local attacker with access to a KVM virtual CPU to trigger an invalid interrupt and potentially cause a denial of service. Red Hat rated this flaw Moderate (CVSS 3.1 score 5.5, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) because the impact is limited to availability, with no confidentiality or integrity impact; this differs from the upstream CVEORG rating of Important (8.8), which assumes a changed scope with high confidentiality and integrity impact. Red Hat Enterprise Linux and Red Hat In-Vehicle OS are not affected by this flaw because the vulnerable LoongArch KVM code is not present in the kernels shipped for these products.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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 | N/A | 8.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Changed |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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