CVE-2025-21096
Description
Improper buffer restrictions in the firmware for some Intel(R) TDX may allow a privileged user to potentially enable escalation of privilege via local access.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A vulnerability in Intel TDX firmware allows a privileged user to achieve escalation of privilege via local access due to improper buffer restrictions.
Vulnerability
Description
CVE-2025-21096 describes an improper buffer restriction vulnerability in the firmware of some Intel(R) TDX (Trusted Domain Extensions). The root cause is that the firmware does not properly enforce buffer boundaries under certain conditions, which could allow a privileged user to exploit this weakness.
Attack
Vector and Prerequisites
Exploitation requires local access and a privileged user context. The vulnerability is in the firmware code that handles TDX domain management operations. An attacker would need to already have elevated privileges on the system to trigger the improper buffer handling.
Impact
If successfully exploited, a privileged user could escalate their privileges further within the affected environment. Given the low CVSS score of 1.9, the practical exploitability is limited and requires significant existing access.
Mitigation
Intel has released a firmware update to address this issue. Users should update their TDX firmware to the latest version provided by their platform vendor, as described in the Intel security advisory INTEL-SA-01312 [1].
AI Insight generated on May 19, 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
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
0No linked articles in our index yet.