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CVE-2026-71968OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT

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.

Timeline

  1. ID reserved

    By VulnCheck

  2. · 2 days later

    Published

  3. · 3 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-71968, by who scored it
Scored byCVSSScoreVector
VulnCheckCNA (assigner)4.0High8.4CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheckCNA (assigner)3.1Medium6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Awaiting Analysis4.0High8.4CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.14% · top 97% of all CVEs (12 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.4.

Affected products

  • OP-TEE · optee_os

    • affected ≤ 4.10.0
    • unaffected 8794043c4065c26a2b8b1313794ba5ba5f06d296

References

References3

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .