CVE-2026-71969

Name	CVE-2026-71969
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1144386

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
optee-os (PTS)	trixie	4.5.0-2	vulnerable
	sid	4.10.0-2	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
optee-os	source	(unstable)	(unfixed)			1144386

Notes

[trixie] - optee-os <no-dsa> (Minor issue)
https://github.com/OP-TEE/optee_os/pull/7898
https://github.com/OP-TEE/optee_os/pull/7808
Fixed by: https://github.com/OP-TEE/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3