CVE-2026-71967

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Source
https://cve.org/CVERecord?id=CVE-2026-71967
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71967.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-71967
Downstream
Published
2026-08-10T18:11:01Z
Modified
2026-08-15T17:18:47Z
Severity
  • 5.7 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71967.json"
}
References

Affected packages

Git / github.com/op-tee/optee_os

Affected ranges

Type
GIT
Repo
https://github.com/op-tee/optee_os
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
753afbbee1682f5d16fd30e87b31058a4fd4f4b8
Fixed
0aadfc23407f50e770eb5ddd871fc208f5626833
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.10.0"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.1.0
0.2.0
0.3.0
1.*
1.0.0
1.0.0-rc1
1.0.0-rc2
1.0.1
1.1.0
2.*
2.0.0
2.1.0
2.2.0
2.3.0
2.4.0
2.5.0
2.5.0-rc1
2.5.0-rc2
2.6.0
2.6.0-rc1
Other
20160825-for-lmg
3.*
3.0.0
3.0.0-rc1
3.0.0-rc2
3.1.0
3.1.0-rc1
3.10.0
3.10.0-rc1
3.11.0
3.11.0-rc1
3.12.0
3.12.0-rc1
3.13.0
3.13.0-rc1
3.14.0
3.14.0-rc1
3.15.0
3.15.0-rc1
3.16.0
3.17.0
3.17.0-rc1
3.18.0
3.18.0-rc1
3.19.0
3.19.0-rc1
3.2.0
3.2.0-rc1
3.20.0
3.20.0-rc1
3.21.0
3.21.0-rc1
3.22.0
3.22.0-rc1
3.3.0
3.3.0-rc2
3.4.0
3.4.0-rc1
3.5.0
3.5.0-rc1
3.6.0
3.6.0-rc1
3.7.0
3.7.0-rc1
3.8.0
3.8.0-rc1
3.9.0
3.9.0-rc1
4.*
4.0.0
4.0.0-rc1
4.1.0
4.1.0-rc1
4.10.0
4.10.0-rc1
4.2.0
4.2.0-rc1
4.3.0
4.3.0-rc1
4.4.0
4.4.0-rc1
4.5.0
4.5.0-rc1
4.6.0
4.6.0-rc1
4.7.0
4.7.0-rc1
4.8.0
4.8.0-rc1
4.9.0
4.9.0-rc1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71967.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "112488651674395303960172839095137444515",
                "300413817071004639452735836454770249184",
                "308783664032164876628373890168517112932",
                "135067116814026817076315052746175811748"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-71967-6d8d7acb",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/op-tee/optee_os/commit/0aadfc23407f50e770eb5ddd871fc208f5626833",
        "target": {
            "file": "core/pta/widevine.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-15T17:18:47Z"