CVE-2026-20453
Description
Out-of-bounds write in Mediatek geniezone driver allows local privilege escalation when attacker already holds System privileges, no user interaction required.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Out-of-bounds write in Mediatek geniezone driver allows local privilege escalation when attacker already holds System privileges, no user interaction required.
Vulnerability
An out-of-bounds write vulnerability exists in the geniezone subcomponent of certain MediaTek chipsets due to a missing bounds check (CWE-787). Affected chipsets include MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6835, MT6853, and others as listed in the June 2026 Product Security Bulletin [1].
Exploitation
An attacker must already have obtained System privilege on the device to trigger this vulnerability. No user interaction is required. The missing bounds check enables writing data beyond the allocated buffer, which can be leveraged to escalate privileges further.
Impact
Successful exploitation results in local escalation of privilege, potentially allowing the attacker to execute code at a higher privilege level (e.g., kernel mode) and gain full control over the device.
Mitigation
MediaTek has released patch ID ALPS10886526 as part of the June 2026 Product Security Bulletin [1]. Device OEMs were notified at least two months prior to publication. Users should apply the security update provided by their device manufacturer. No active exploitation in the wild has been reported at the time of publication.
AI Insight generated on Jun 1, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
1News mentions
1- MediaTek: Four CVEs Disclosed — Three GenieZone TEE Bugs and a WLAN Driver OverflowVypr Intelligence · Jun 1, 2026