OP-TEE Trusted OS vulnerable to Improper Validation of Array Index in the cleanup_shm_refs function

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Summary

CVECVE-2022-46152
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-11-29 17:15:11 UTC
Updated2026-06-05 20:23:06 UTC
DescriptionOP-TEE Trusted OS is the secure side implementation of OP-TEE project, a Trusted Execution Environment. Versions prior to 3.19.0, contain an Improper Validation of Array Index vulnerability. The function `cleanup_shm_refs()` is called by both `entry_invoke_command()` and `entry_open_session()`. The commands `OPTEE_MSG_CMD_OPEN_SESSION` and `OPTEE_MSG_CMD_INVOKE_COMMAND` can be executed from the normal world via an OP-TEE SMC. This function is not validating the `num_params` argument, which is only limited to `OPTEE_MSG_MAX_NUM_PARAMS` (127) in the function `get_cmd_buffer()`. Therefore, an attacker in the normal world can craft an SMC call that will cause out-of-bounds reading in `cleanup_shm_refs` and potentially freeing of fake-objects in the function `mobj_put()`. A normal-world attacker with permission to execute SMC instructions may exploit this flaw. Maintainers believe this problem permits local privilege escalation from the normal world to the secure world. Version 3.19.0 contains a fix for this issue. There are no known workarounds.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.004080000 probability, percentile 0.616320000 (date 2026-06-11)

Problem Types: CWE-129 | CWE-129 CWE-129: Improper Validation of Array Index

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1[email protected]Secondary8.2HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Trustedfirmware Op-tee All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OP-TEE Optee Os affected < 3.19.0 Not specified

References

ReferenceSourceLinkTags
Improper Validation of Array Index in the cleanup_shm_refs function · Advisory · OP-TEE/optee_os · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit, Third Party Advisory
NVD - CVSS v3 Calculator af854a3a-2127-422b-91ae-364da2661108 nvd.nist.gov Third Party Advisory, US Government Resource
optee_os/entry_std.c at c2d449482de098f1c894b94f338440e5a327813d · OP-TEE/optee_os · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Third Party Advisory
core: tee_entry: fix array out of bounds check in cleanup_shm_refs() · OP-TEE/optee_os@728616b · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
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