CVE-2026-68435
Description
A flaw was found in the Linux kernel, specifically within the LoongArch architecture's kexec command line lookup functionality. A local attacker could exploit this by using the kexec_load system call, which incorrectly passes a user-space segment buffer to a kernel function without proper validation. This improper handling leads to dereferencing a user pointer in kernel context, potentially resulting in a denial of service or information disclosure.
Statement
This issue affects LoongArch systems using kexec_load(). The kernel incorrectly dereferences user-space segment buffers when searching for the kexec command line marker. Systems not using LoongArch 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 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | 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 | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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