{"id":"CVE-2026-53763","summary":"OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee","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 3.0.0 and prior to version 4.11.0, 32-bit integer overflows in OP-TEE core's AES-GCM implementation cause the authentication tag to be computed with incorrect bit-length values after processing more than 512 megabytes of payload or Additional Authenticated Data (AAD). Version 4.11.0 contains a patch. No known workarounds are available.","aliases":["GHSA-fcm8-vjhf-6vqh"],"modified":"2026-10-21T02:58:30.224274660Z","published":"2026-07-06T19:35:39.800Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53763.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-190"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53763.json"},{"type":"ADVISORY","url":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53763"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/op-tee/optee_os","events":[{"introduced":"94ee4938f7f544d07d11721a355f445c020663ca"},{"fixed":"f54190f22611dd5ad5d22546fd4209aa100f56bd"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"3.0.0"},{"fixed":"4.11.0"}]}]}}],"versions":["4.11.0-rc1","4.10.0","4.10.0-rc1","4.9.0","4.9.0-rc1","4.8.0","4.8.0-rc1","4.7.0","4.7.0-rc1","4.6.0","4.6.0-rc1","4.5.0","4.5.0-rc1","4.4.0","4.4.0-rc1","4.3.0","4.3.0-rc1","4.2.0","4.2.0-rc1","4.1.0","4.1.0-rc1","4.0.0","4.0.0-rc1","3.22.0","3.22.0-rc1","3.21.0","3.21.0-rc1","3.20.0","3.20.0-rc1","3.19.0","3.19.0-rc1","3.18.0","3.18.0-rc1","3.17.0","3.17.0-rc1","3.16.0","3.15.0","3.15.0-rc1","3.14.0","3.14.0-rc1","3.13.0","3.13.0-rc1","3.12.0","3.12.0-rc1","3.11.0","3.11.0-rc1","3.10.0","3.10.0-rc1","3.9.0","3.9.0-rc1","3.8.0","3.8.0-rc1","3.7.0","3.7.0-rc1","3.6.0","3.6.0-rc1","3.5.0","3.5.0-rc1","3.4.0","3.4.0-rc1","3.3.0","3.3.0-rc2","3.2.0","3.2.0-rc1","3.1.0","3.1.0-rc1","3.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53763.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N"}]}