CVE-2026-42546

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Source
https://cve.org/CVERecord?id=CVE-2026-42546
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42546.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42546
Aliases
  • GHSA-c7j8-fgqw-rcgp
Downstream
Published
2026-07-06T19:31:56Z
Modified
2026-10-21T02:57:50Z
Severity
  • 3.8 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L CVSS Calculator
Summary
OP-TEE has missing OPTEE_MSG_ATTR_TYPE_MASK in cleanup_shm_refs() leaks mobj references
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. 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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42546.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
ee595e950f5be1ace3e831261c22a0e99f959046
Fixed
f54190f22611dd5ad5d22546fd4209aa100f56bd
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "3.3.0"
                },
                {
                    "fixed":  "4.11.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        }
    ]
}

Affected versions

3.*
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
3.20.0
3.20.0-rc1
3.21.0
3.21.0-rc1
3.22.0
3.22.0-rc1
3.3.0
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
4.11.0-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-2026-42546.json"