PT-2026-55975 · Op Tee · Optee Os
Jenswikl
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Published
2026-07-06
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Updated
2026-07-06
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CVE-2026-42546
CVSS v3.1
3.8
Low
| Vector | AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L |
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. Starting in version 3.3.0 and prior to version 4.11.0, a resource leak exists in OP-TEE’s shared memory cleanup logic because the function
cleanup shm refs() in core/tee/entry std.c fails to apply a required bitmask (OPTEE MSG ATTR TYPE MASK) to parameter attributes. When processing non-contiguous memory parameters from a normal-world caller, the system fails to match the attribute type in its internal switch statement and skips the necessary mobj put() call. This results in a persistent reference leak of mobj reg shm objects, which remain on internal lists with dangling refcounts. This affects non-FF-A configurations that support non-contiguous, non-secure shared memory. Over time, these accumulated leaks progressively consume the secure-world heap, degrading the system's ability to service trusted application operations and eventually requiring a reboot to recover. Version 4.11.0 contains a patch. No known workarounds are available.Fix
Allocation of Resources Without Limits
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Weakness Enumeration
Related Identifiers
Affected Products
Optee Os