optee-os — security advisory

{
  "id": "2513acb201a709e5e7e82acf7f33c01472082fdfa423b1c95f0e8fa6a1c3bd3f",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-42546",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-42546",
    "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. 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.",
    "evidence": "osv:DEBIAN-CVE-2026-42546",
    "products": [
      {
        "name": {
          "value": "optee-os",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "4.10.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.10.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.5.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.7.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.8.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.9.0-1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "low",
    "structured": {
      "id": "DEBIAN-CVE-2026-42546",
      "aliases": [
        "DEBIAN-CVE-2026-42546"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "optee-os",
            "purl": "pkg:deb/debian/optee-os?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "4.10.0-1",
            "4.10.0-2",
            "4.5.0-2",
            "4.7.0-1",
            "4.8.0-1",
            "4.9.0-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42546.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T11:47:36.473234780Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-42546"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-42546"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-42546",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450890,
  "published_at": "2026-07-06T20:16:33.257+00:00"
}