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Vulnerability details

CVE-2026-71968

OP-TEE optee_os

OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT

CVSS 4.0
8.4High

Official description

OP-TEE OS through 4.10.0, fixed in commit 8794043, contains a use-after-free vulnerability in the Trusted Application loader that allows attackers with the ability to load a signed Trusted Application to corrupt secure-world kernel memory by setting the TA_FLAG_CONCURRENT flag in a user TA signed header. Attackers can cause two concurrent sessions to operate on the same shared context without locking, corrupting the uctx->vm_info.regions list during memref parameter mapping and unmapping to free vm_region nodes still in use, resulting in a use-after-free in S-EL1 secure-world kernel memory.

CVSS scores

ScoreVersionSourceVector
8.4High 4.0 CVEProject cvelistV5 (CNA) (VulnCheck) 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
6.7Medium 3.1 CVEProject cvelistV5 (CNA) (VulnCheck) CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
OP-TEE optee_os v ≤ 4.10.0 CVEProject cvelistV5 (CNA)

References and advisories

3
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Details

Published
2026-08-10
Last updated
2026-11-08
State
Published
Assigner (CNA)
VulnCheck

Exploit prediction (EPSS)

0.13%
Probability of exploitation in 30 days
3%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-416
    Use After Free
  • CWE-362
    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')