Read the docs
TI-2026-50264 Aliases CVE-2026-71969GHSA-hg7c-pmh6-576f

OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations

Priority LOW 38CWE-124Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When src_len exceeds rsa_len, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00182 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OP-TEEoptee_osup to 4.10.0—Patch availableCNA
  • optee_os VendorOP-TEE Affected up to 4.10.0 Fixed in — Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*——OP-TEE
  • cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:* Versions — — ·OP-TEE

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-71969
  2. 2026-10-03 Alias added: GHSA-hg7c-pmh6-576f

References

Exploit 1

Patch 1

Other 2

  • TI-2021-09019 In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, an… KEVCVSS 3.1MEDIUM 5.5
  • TI-2022-22796 OP-TEE Trusted OS vulnerable to Improper Validation of Array Index in the cleanup_shm_refs function CVSS 3.1HIGH 8.8
  • TI-2026-29072 OP-TEE has a Use-After-Free race in FF-A shared-memory teardown CVSS 3.1HIGH 7.8
  • TI-2025-29404 REE userspace code can panic TAs, leading to fTPM PCR reset and data disclosure CVSS 3.1HIGH 7.9
  • TI-2023-21925 OP-TEE double free in shdr_verify_signature CVSS 3.1HIGH 7.4
  • TI-2026-33359 OP-TEE vulnerable to ECDH private key recovery CVSS 3.1MEDIUM 4.7
See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences