CVE-2026-20456
Description
A missing bounds check in MediaTek wlan STA driver allows local users to cause a system crash, leading to denial of service.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A missing bounds check in MediaTek wlan STA driver allows local users to cause a system crash, leading to denial of service.
Vulnerability
A missing bounds check in the wlan STA driver of certain MediaTek chipsets can lead to a system crash. This vulnerability is identified as CVE-2026-20456 in the MediaTek June 2026 Product Security Bulletin [1]. The issue requires User execution privileges and no user interaction. The affected chipsets are not explicitly listed in the bulletin, but the driver is part of MediaTek's wireless subsystem. The patch ID is WCNCR00480851.
Exploitation
An attacker must have User execution privileges on the target device. No user interaction is required. The attacker can trigger the vulnerability by sending crafted input to the wlan STA driver, causing a system crash due to the missing bounds check.
Impact
Successful exploitation results in a local denial of service (system crash). No privilege escalation or data compromise is indicated by the available references.
Mitigation
MediaTek has released a patch (WCNCR00480851) as part of the June 2026 Product Security Bulletin [1]. Device OEMs have been notified and are expected to distribute the update. Users should apply updates from their device manufacturer. No workaround is mentioned in the bulletin.
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.
Patches
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
0No linked articles in our index yet.