PT-2026-69901 · Debian+3 · Optee Os
CVE-2026-71967
·
Published
2026-08-10
·
Updated
2026-08-25
CVSS v4.0
5.7
Medium
| Vector | AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
OP-TEE OS versions prior to 4.10.0 commit 0aadfc2
Description
A null pointer dereference occurs in the Widevine pseudo-TA
open session handler when CFG WIDEVINE PTA is enabled. Normal World clients can trigger this by opening a session directly on the Widevine PTA, leading to an unconditional dereference of a NULL calling session pointer through the is user ta ctx() function. This results in a fault at S-EL1, causing a denial of service by crashing the trusted execution environment (TEE), which is a secure area of the main processor used to protect sensitive data.Recommendations
Update to the version containing commit 0aadfc2.
As a temporary mitigation, disable the
CFG WIDEVINE PTA configuration.Exploit
Fix
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Optee Os