5.5

CVE-2026-45702: op-tee optee_os Type Confusion

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-45702DEBIAN-CVE-2026-45702
Published 03-06-2026Last modified 04-06-2026
Open JSON

Vulnerability summary

CVE-2026-45702 is a medium (CVSS 5.5) Type Confusion vulnerability in op-tee optee_os. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 03-06-2026
    PublishedVulnerability first disclosed.
  2. 04-06-2026
    Last modifiedVulnerability information updated.

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 4.3.0 and prior to version 4.11.0, a type confusion vulnerability exists in OP-TEE OS when processing an FFA_MEM_SHARE request from the normal world. This only applies when OP-TEE is configured as an SPMC for S-EL0 SPs, that is, with `CFG_CORE_SEL1_SPMC=y` and `CFG_SECURE_PARTITION=y`. Version 4.11.0 fixes the issue.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.01 pp

From 0.15% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Optee Os

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • optee-osAll versions (No fix recorded)
Op-tee1 product
Trustedfirmware1 product
Ubuntu1 product
  • optee-osAll versions (No fix recorded)

4 vendors · 4 products

References

4 links