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CVE PROGRAM SOURCE RECORD5.7 Medium

CVE-2026-71967

OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

OP-TEE optee_os

Default version status: affected

  • 0 to ≤ 4.10.0affected
  • 0aadfc23407f50e770eb5ddd871fc208f5626833unaffected
pkg:github/OP-TEE/optee_os

References