CVE-2026-71969
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.4
- CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 0.13%
- CWE
- CWE-787, CWE-124
- Published
- 2026-08-10
- Last modified
- 2026-08-17
Affected products
- OP-TEE optee_os
- OP-TEE optee_os
Weakness type
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