CVE-2026-34859
Published: 13 April 2026
Summary
CVE-2026-34859 is a medium-severity Use After Free (CWE-416) vulnerability in Huawei Harmonyos. Its CVSS base score is 5.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 0.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the specific Use-After-Free vulnerability in the kernel module through timely identification, reporting, and correction of the flaw.
Implements memory protection mechanisms that restrict unauthorized access to deallocated kernel memory, directly preventing UAF exploitation.
Enforces secure kernel configuration settings, such as ASLR and other hardening parameters, to mitigate exploitation of the UAF vulnerability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local kernel use-after-free vulnerability with no privileges required directly enables exploitation for privilege escalation.
NVD Description
UAF vulnerability in the kernel module. Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.
Deeper analysisAI
CVE-2026-34859 is a Use-After-Free (UAF) vulnerability, classified under CWE-416, in the kernel module. Published on 2026-04-13T05:16:03.810, it carries a CVSS v3.1 base score of 5.9 (AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). Successful exploitation affects availability and confidentiality.
A local attacker requires no privileges and can exploit the vulnerability with low attack complexity and no user interaction. Exploitation enables low impacts on confidentiality, integrity, and availability.
Huawei advisories detail mitigations at https://consumer.huawei.com/en/support/bulletin/2026/4/ and https://consumer.huawei.com/en/support/bulletinvision/2026/4/.
Details
- CWE(s)