Buffer overflow in Intel(r) Tdx

CVE-2025-21096

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.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 1.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (2.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-21096: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

  • Intel(r) Tdx — versions See references

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-21096?
CVE-2025-21096 is a low-severity vulnerability in Intel(r) Tdx, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 1.9/10. Published 2025-08-12.
How severe is CVE-2025-21096?
Low severity. CVSS v3 base score is 1.9 out of 10.