CVE-2026-71969

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Source
https://cve.org/CVERecord?id=CVE-2026-71969
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71969.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-71969
Downstream
Published
2026-08-10T18:18:43.851Z
Modified
2026-08-12T16:10:04.582773Z
Severity
  • 8.4 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations
Details

OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When srclen exceeds rsalen, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap memory.

Database specific 
{
    "cwe_ids": [
        "CWE-124",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71969.json",
    "cna_assigner": "VulnCheck"
}
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
7b8b494e0a324cefec8ed386b7de413b44f1aaf3
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

vanir_signatures_modified 
"2026-08-12T16:10:04Z"
vanir_signatures 
[
    {
        "id": "CVE-2026-71969-40879176",
        "deprecated": false,
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "length": 1305.0,
            "function_hash": "8593490274038801812299774956013891773"
        },
        "source": "https://github.com/op-tee/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3",
        "target": {
            "function": "crypto_acipher_rsanopad_encrypt",
            "file": "core/drivers/crypto/crypto_api/acipher/rsa.c"
        }
    },
    {
        "id": "CVE-2026-71969-67a904d1",
        "deprecated": false,
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "length": 990.0,
            "function_hash": "84306322295274223870615062802190114626"
        },
        "source": "https://github.com/op-tee/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3",
        "target": {
            "function": "crypto_acipher_rsanopad_decrypt",
            "file": "core/drivers/crypto/crypto_api/acipher/rsa.c"
        }
    },
    {
        "id": "CVE-2026-71969-87330acb",
        "deprecated": false,
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "270211364791338103468314459693957136595",
                "165326094664678406136139610498641081165",
                "118724124800718350337606844884752223331",
                "92894932607962928401230130311926705564",
                "319129369497590294457666038665529691463",
                "153604258677281153790760704916686388638",
                "173156928024286145726978465812514023469",
                "247753550511696995820956835418065646925"
            ]
        },
        "source": "https://github.com/op-tee/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3",
        "target": {
            "file": "core/drivers/crypto/crypto_api/acipher/rsa.c"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71969.json"