CVE-2025-22034
Description
A flaw was found in the Linux kernel's memory management subsystem. A local user could exploit this vulnerability to cause a Denial of Service (DoS) by crashing the system. This issue occurs during device-exclusive memory operations on hugetlb (Huge Translation Lookaside Buffer) mappings, where the kernel improperly attempts to split huge pages and triggers a kernel panic.
Statement
This vulnerability is rated as Low severity for Red Hat Enterprise Linux because exploitation requires local authenticated access alongside specific hardware drivers utilizing heterogeneous memory management features on hugepage mappings. An invalid page split operation on hugetlb regions results in a local denial of service via a kernel crash, without enabling privilege escalation or data disclosure. Earlier enterprise distributions, including Red Hat Enterprise Linux 8 and 9, are unaffected because the vulnerable code path is not present.
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 | 4.7 | 5.5 | 7.8 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | High | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | High |
| Integrity Impact | None | None | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/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
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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