CVE-2026-71968: Use After Free in OP-TEE optee_os
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.
AI Analysis
Technical Summary
CVE-2026-71968 is a use-after-free vulnerability in OP-TEE OS versions up to 4.10.0. The vulnerability occurs in the Trusted Application loader when an attacker loads a signed Trusted Application with the TA_FLAG_CONCURRENT flag set. This flag causes two concurrent sessions to operate on the same shared context without locking, corrupting the uctx->vm_info.regions list during memory reference parameter mapping and unmapping. This results in freeing vm_region nodes that are still in use, causing a use-after-free condition in the S-EL1 secure-world kernel memory. The vulnerability was fixed in commit 8794043.
Potential Impact
An attacker with the ability to load a signed Trusted Application can exploit this vulnerability to corrupt secure-world kernel memory in OP-TEE OS. This memory corruption could potentially lead to denial of service or other impacts on the secure environment's integrity. The CVSS 4.0 score is 8.4 (high severity), reflecting the complexity and impact of the vulnerability.
Mitigation Recommendations
A fix for this vulnerability is available in OP-TEE OS starting from the commit identified as 8794043. Users should upgrade to a version including this commit or later to remediate the issue. Since no official patch version is explicitly stated, users should consult the OP-TEE project repository or vendor advisory for the exact fixed version and apply the update accordingly.
CVE-2026-71968: Use After Free in OP-TEE optee_os
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 v4.0
Score 8.4high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-71968 is a use-after-free vulnerability in OP-TEE OS versions up to 4.10.0. The vulnerability occurs in the Trusted Application loader when an attacker loads a signed Trusted Application with the TA_FLAG_CONCURRENT flag set. This flag causes two concurrent sessions to operate on the same shared context without locking, corrupting the uctx->vm_info.regions list during memory reference parameter mapping and unmapping. This results in freeing vm_region nodes that are still in use, causing a use-after-free condition in the S-EL1 secure-world kernel memory. The vulnerability was fixed in commit 8794043.
Potential Impact
An attacker with the ability to load a signed Trusted Application can exploit this vulnerability to corrupt secure-world kernel memory in OP-TEE OS. This memory corruption could potentially lead to denial of service or other impacts on the secure environment's integrity. The CVSS 4.0 score is 8.4 (high severity), reflecting the complexity and impact of the vulnerability.
Mitigation Recommendations
A fix for this vulnerability is available in OP-TEE OS starting from the commit identified as 8794043. Users should upgrade to a version including this commit or later to remediate the issue. Since no official patch version is explicitly stated, users should consult the OP-TEE project repository or vendor advisory for the exact fixed version and apply the update accordingly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-08T16:43:04.178Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7a1b7bbf8831d539547601
Added to database: 08/10/2026, 18:42:03 UTC
Last enriched: 08/10/2026, 18:56:26 UTC
Last updated: 09/06/2026, 10:52:10 UTC
Views: 44
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.