CVE-2026-34854
Published: 13 April 2026
Summary
CVE-2026-34854 is a medium-severity Use After Free (CWE-416) vulnerability in Huawei Harmonyos. Its CVSS base score is 5.7 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Credential Access (T1212); ranked at the 0.1th 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-2 (Flaw Remediation) and CM-6 (Configuration Settings).
Deeper analysis
CVE-2026-34854 is a Use-After-Free (UAF) vulnerability, classified under CWE-416, present in the kernel module. Published on 2026-04-13, it carries a CVSS v3.1 base score of 5.7 (Medium severity) and primarily impacts Huawei products, as referenced in the vendor's support bulletin.
Exploitation requires local access (AV:L), high attack complexity (AC:H), and high privileges (PR:H), with no user interaction (UI:N) and unchanged scope (S:U). A successful attack can achieve high confidentiality impact (C:H) and high availability impact (A:H), with no integrity impact (I:N), allowing a privileged local attacker to potentially disclose sensitive kernel memory and cause denial of service.
Huawei has published a support bulletin at https://consumer.huawei.com/en/support/bulletin/2026/4/ addressing this vulnerability, which security practitioners should consult for details on patches and mitigation steps.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-21830
Vulnerability details
UAF vulnerability in the kernel module. Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Kernel UAF enables exploitation to disclose sensitive memory for credential access (T1212) and cause system DoS (T1499) via local privileged access.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires timely identification, reporting, and correction of flaws, directly addressing the kernel UAF vulnerability in CVE-2026-34854 through vendor patches from the Huawei bulletin.
Implements memory protection mechanisms like ASLR, DEP, and guard pages that hinder exploitation of the UAF for kernel memory disclosure or DoS.
Enforces secure kernel configuration settings, including hardening parameters that provide additional defenses against UAF exploitation in kernel modules.