What is CVE-2026-71967?

CVE-2026-71967 is a medium-severity vulnerability in Op-tee Optee_os, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-08-10.

How severe is CVE-2026-71967?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Op-tee Optee_os

CVE-2026-71967

OP-TEE OS through 4.10.0, fixed in commit 0aadfc2, contains a null pointer dereference vulnerability in the Widevine pseudo-TA open_session handler that allows Normal World clients to cause a denial of service when CFG_WIDEVINE_PTA is enab…

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Op-tee Optee_os — versions 0, 0aadfc23407f50e770eb5ddd871fc208f5626833

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

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

Frequently asked questions

What is CVE-2026-71967?: CVE-2026-71967 is a medium-severity vulnerability in Op-tee Optee_os, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-08-10.
How severe is CVE-2026-71967?: Medium severity. CVSS v3 base score is 5.5 out of 10.