Vulnerability-Lookup

CVE-2026-33317 (GCVE-0-2026-33317)

Vulnerability from cvelistv5 – Published: 2026-04-24 02:20 – Updated: 2026-04-24 18:18

Title

OP-TEE: PKCS#11 TA out-of-bounds read and memory disclosure

Summary

OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. In versions 3.13.0 through 4.10.0, missing checks in `entry_get_attribute_value()` in `ta/pkcs11/src/object.c` can lead to out-of-bounds read from the PKCS#11 TA heap or a crash. When chained with the OOB read, the PKCS#11 TA function `PKCS11_CMD_GET_ATTRIBUTE_VALUE` or `entry_get_attribute_value()` can, with a bad template parameter, be tricked into reading at most 7 bytes beyond the end of the template buffer and writing beyond the end of the template buffer with the content of an attribute value of a PKCS#11 object. Commits e031c4e562023fd9f199e39fd2e85797e4cbdca9, 16926d5a46934c46e6656246b4fc18385a246900, and 149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca contain patches and are anticipated to be part of version 4.11.0.

Severity

8.7 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-24 17:19 UTC

CWE

CWE-125 - Out-of-bounds Read
CWE-787 - Out-of-bounds Write

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/OP-TEE/optee_os/security/advis…	x_refsource_CONFIRM
https://github.com/OP-TEE/optee_os/commit/149e8d7…	x_refsource_MISC
https://github.com/OP-TEE/optee_os/commit/16926d5…	x_refsource_MISC
https://github.com/OP-TEE/optee_os/commit/e031c4e…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
OP-TEE	optee_os	Affected: >= 3.13.0, <= 4.10.0	guessed

Show details on NVD website

JSON

To clipboard

{
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33317",
                "options": [
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                    "Exploitation": "none"
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                  },
                  {
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-24T17:19:41.848151Z",
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          "shortName": "CISA-ADP"
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      "source": {
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    "datePublished": "2026-04-24T02:20:55.670Z",
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      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "OP-TEE: PKCS#11 TA out-of-bounds read and memory disclosure",
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    "vulnrichment": {
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}

FKIE_CVE-2026-33317

Vulnerability from fkie_nvd - Published: 2026-04-24 03:16 - Updated: 2026-06-17 10:37

Severity

8.7 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/OP-TEE/optee_os/commit/149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca	Patch
security-advisories@github.com	https://github.com/OP-TEE/optee_os/commit/16926d5a46934c46e6656246b4fc18385a246900	Patch
security-advisories@github.com	https://github.com/OP-TEE/optee_os/commit/e031c4e562023fd9f199e39fd2e85797e4cbdca9	Patch
security-advisories@github.com	https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9	Exploit, Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	trustedfirmware	op-tee	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "optee_os",
          "vendor": "OP-TEE",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.13.0, \u003c= 4.10.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F792A75A-2B9C-4D8D-9B0A-2CF9EFCE8178",
              "versionEndIncluding": "4.10.0",
              "versionStartIncluding": "3.13.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. In versions 3.13.0 through 4.10.0, missing checks in `entry_get_attribute_value()`  in `ta/pkcs11/src/object.c` can lead to out-of-bounds read from the PKCS#11 TA heap or a crash. When chained with the OOB read, the PKCS#11 TA function `PKCS11_CMD_GET_ATTRIBUTE_VALUE`  or `entry_get_attribute_value()` can, with a bad template parameter, be tricked into reading at most 7 bytes beyond the end of the template buffer and writing beyond the end of the template buffer with the content of an attribute value of a PKCS#11 object. Commits e031c4e562023fd9f199e39fd2e85797e4cbdca9, 16926d5a46934c46e6656246b4fc18385a246900, and 149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca contain patches and are anticipated to be part of version 4.11.0."
    }
  ],
  "id": "CVE-2026-33317",
  "lastModified": "2026-06-17T10:37:18.787",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L",
          "version": "3.1"
        },
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        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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    ],
    "ssvcV203": [
      {
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        "ssvcData": {
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          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
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            }
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          "role": "CISA Coordinator",
          "timestamp": "2026-04-24T17:19:41.848151Z",
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  "references": [
    {
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      "tags": [
        "Patch"
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      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
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      "url": "https://github.com/OP-TEE/optee_os/commit/16926d5a46934c46e6656246b4fc18385a246900"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/OP-TEE/optee_os/commit/e031c4e562023fd9f199e39fd2e85797e4cbdca9"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
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        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

ubuntu-cve-2026-33317

Vulnerability from osv_ubuntu

Published

2026-04-24 03:16

Modified

2026-05-20 15:27

Summary

Details

OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. In versions 3.13.0 through 4.10.0, missing checks in entry_get_attribute_value() in ta/pkcs11/src/object.c can lead to out-of-bounds read from the PKCS#11 TA heap or a crash. When chained with the OOB read, the PKCS#11 TA function PKCS11_CMD_GET_ATTRIBUTE_VALUE or entry_get_attribute_value() can, with a bad template parameter, be tricked into reading at most 7 bytes beyond the end of the template buffer and writing beyond the end of the template buffer with the content of an attribute value of a PKCS#11 object. Commits e031c4e562023fd9f199e39fd2e85797e4cbdca9, 16926d5a46934c46e6656246b4fc18385a246900, and 149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca contain patches and are anticipated to be part of version 4.11.0.

Severity

8.7 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-33317	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-33317	REPORT
	https://github.com/OP-TEE/optee_os/security/advis…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "optee-os",
            "binary_version": "4.7.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "optee-os",
        "purl": "pkg:deb/ubuntu/optee-os@4.7.0-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.5.0-1",
        "4.5.0-2",
        "4.7.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "optee-os",
            "binary_version": "4.8.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "optee-os",
        "purl": "pkg:deb/ubuntu/optee-os@4.8.0-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.7.0-1",
        "4.8.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. In versions 3.13.0 through 4.10.0, missing checks in `entry_get_attribute_value()`  in `ta/pkcs11/src/object.c` can lead to out-of-bounds read from the PKCS#11 TA heap or a crash. When chained with the OOB read, the PKCS#11 TA function `PKCS11_CMD_GET_ATTRIBUTE_VALUE`  or `entry_get_attribute_value()` can, with a bad template parameter, be tricked into reading at most 7 bytes beyond the end of the template buffer and writing beyond the end of the template buffer with the content of an attribute value of a PKCS#11 object. Commits e031c4e562023fd9f199e39fd2e85797e4cbdca9, 16926d5a46934c46e6656246b4fc18385a246900, and 149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca contain patches and are anticipated to be part of version 4.11.0.",
  "id": "UBUNTU-CVE-2026-33317",
  "modified": "2026-05-20T15:27:22Z",
  "published": "2026-04-24T03:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33317"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33317"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-33317"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-33317 (GCVE-0-2026-33317)

FKIE_CVE-2026-33317

ubuntu-cve-2026-33317

Vulnerability from osv_ubuntu

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