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.
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Mon, 10 Aug 2026 21:30:00 +0000
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| 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. | |
| Title | OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session | |
| Weaknesses | CWE-476 | |
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-10T21:10:24.782Z
Reserved: 2026-08-08T16:43:04.178Z
Link: CVE-2026-71967
Updated: 2026-08-10T18:59:16.740Z
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OpenCVE Enrichment
Updated: 2026-08-10T20:15:03Z