Emui CVE-2026-34854

CVSS 5.7 indicates moderate severity with significant constraints limiting real-world exploitability: attack vector is local-only (AV:L, requiring device access or local code execution first), attack complexity is high (AC:H, implying non-trivial trigger conditions), and privilege escalation prerequisites exist (PR:H, requires high-level access). EPSS data not provided, but the combination of local-only vector and high complexity suggests lower exploitation probability than the baseline CVSS score implies. Absence of public POC or KEV status indicates this is not yet a weaponized threat, though the confidentiality impact (C:H) is notable for information-disclosure risk in multi-user or containerized HarmonyOS environments. Priority assessment: moderate to low for typical deployments, higher for high-security environments where information leakage is critical and attackers may already have local code execution capability.

A local attacker with high-privilege access (such as a compromised system service or malicious privileged application on HarmonyOS/EMUI) triggers a specific kernel code path that dereferences a previously freed memory object. By crafting repeated kernel interactions or exploiting precise timing conditions (high attack complexity), the attacker reads sensitive data from deallocated memory regions (confidentiality impact) or causes a kernel panic/system hang (availability impact). The attack requires no user interaction (UI:N) and does not escape the local security context (scope unchanged, S:U).