{"id":"CVE-2026-53763","aliases":["DEBIAN-CVE-2026-53763","EUVD-2026-41912","GHSA-fcm8-vjhf-6vqh","UBUNTU-CVE-2026-53763"],"status":"published","title":"OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee","description":"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.","severity":{"version":"3.0","score":3.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00194,"percentile":0.0918,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2026-07-06T19:35:39Z","modified":"2026-10-28T02:30:47Z","affected":[{"source":"osv","ecosystem":"Debian:13","package":"optee-os","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"optee-os","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.0-1","4.5.0-2","4.7.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"optee-os","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-1","4.10.0-1","4.10.0-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"optee-os","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.0-1","4.8.0-1"]}],"products":[{"vendor":"op-tee","product":"optee_os"},{"vendor":"trustedfirmware","product":"op-tee"}],"references":[{"url":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-fcm8-vjhf-6vqh","tags":["x_refsource_CONFIRM","Vendor Advisory","Patch","advisory","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53763.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53763","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-53763","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-53763","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53763","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-53763","title":"OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee","description":"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.","status":"published","published":"2026-07-06T19:35:39.8Z","modified":"2026-07-07T14:10:54.311Z","cvss":[{"version":"3.0","score":3.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:20:00.11477Z"}],"euvd":[{"id":"EUVD-2026-41912","description":"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.","status":"published","published":"2026-07-06T19:35:39Z","modified":"2026-07-07T14:10:54Z","cvss":[{"version":"3.0","score":3.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T18:20:11.925616Z"}],"nvd":[{"id":"CVE-2026-53763","description":"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.","status":"published","published":"2026-07-06T20:16:37.327Z","modified":"2026-10-25T20:10:00.147Z","cvss":[{"version":"3.0","score":3.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:12:28.040501Z"}],"osv":[{"id":"CVE-2026-53763","title":"OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication guarantee","description":"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.","status":"published","published":"2026-07-06T19:35:39.8Z","modified":"2026-10-28T02:30:47.42264389Z","cvss":[{"version":"3.0","score":3.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N","level":"low"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:45:08.132336Z"},{"id":"DEBIAN-CVE-2026-53763","description":"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.","status":"published","published":"2026-07-06T20:16:37.327Z","modified":"2026-10-26T11:47:28.391619712Z","cvss":[{"version":"3.0","score":3.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T15:45:57.236551Z"},{"id":"UBUNTU-CVE-2026-53763","description":"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.","status":"published","published":"2026-07-06T20:16:00Z","modified":"2026-10-17T13:00:25.351236483Z","cvss":[{"version":"3.0","score":3.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T16:56:41.382716Z"}]}}