DEBIAN-CVE-2026-33662
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-33662
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33662.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-33662
- Upstream
- Published
- 2026-04-24T19:17:09Z
- Modified
- 2026-09-14T17:03:08Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- 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. From 3.8.0 to 4.10, in the function emsa_pkcs1_v1_5_encode() in core/drivers/crypto/crypto_api/acipher/rsassa.c, the amount of padding needed, "PS size", is calculated by subtracting the size of the digest and other fields required for the EMA-PKCS1-v1_5 encoding from the size of the modulus of the key. By selecting a small enough modulus, this subtraction can overflow. The padding is added as a string of 0xFF bytes with a call to memset(), and an underflowed integer will cause the memset() call to overwrite until OP-TEE crashes. This only affects platforms registering RSA acceleration.
- References
Affected packages
Debian:13 / optee-os
Package
- Name
- optee-os
- Purl
- pkg:deb/debian/optee-os?arch=source&distro=trixie