CVE-2026-71967 — OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session
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 clie…
Published: 2026-08-10 · CVSS: 5.7 · CVSS 4.0
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 enabled. Attackers can open a session directly on the Widevine PTA to trigger an unconditional dereference of a NULL calling session pointer via is_user_ta_ctx(), faulting the TEE at S-EL1 and crashing the trusted execution environment.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7