What is CVE-2026-71969?

CVE-2026-71969 is a medium-severity vulnerability in Op-tee Optee_os, classified under Buffer Underwrite. CVSS score: 6.7/10. Published 2026-08-10.

How severe is CVE-2026-71969?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Op-tee Optee_os

CVE-2026-71969

OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted App…

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Op-tee Optee_os — versions 0, 7b8b494e0a324cefec8ed386b7de413b44f1aaf3

Weakness classification (CWE)

CWE-124 — Buffer Underwrite
CWE-787 — Out-of-bounds Write

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-71969?: CVE-2026-71969 is a medium-severity vulnerability in Op-tee Optee_os, classified under Buffer Underwrite. CVSS score: 6.7/10. Published 2026-08-10.
How severe is CVE-2026-71969?: Medium severity. CVSS v3 base score is 6.7 out of 10.