CVE-2019-1010296: Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Buffer Overflow

Q: How do I fix CVE-2019-1010296?

op-tee: upgrade to newer than 3.3.0. Exact commands for each OS are on this page.

Q: Is CVE-2019-1010296 being exploited?

CVE-2019-1010296 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-1010296 affect?

CVE-2019-1010296 affects op-tee. Severity is critical (CVSS 9.8). Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Buffer Overflow. The impact is: Code execution in context of TEE core (kernel). The component is: optee_os. The fixed version is: 3.4.0 and later.

Q: How urgent is CVE-2019-1010296?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2019-1010296 is a critical-severity flaw (CVSS 9.8) affecting op-tee. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Buffer Overflow. The impact is: Code execution in context of TEE core (kernel). The component is: optee_os. The fixed version is: 3.4.0 and later.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-190, CWE-787
Published	2019-07-15
Last modified	2026-06-17

Publisher (CNA): DWF · Vendor: trustedfirmware

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-07-15 18:15 UTCPublished CVE record published
2026-06-17 02:09 UTCUpdated Record last modified

trustedfirmware op-tee UPGRADE

Affected: <= 3.3.0

Fixed in: newer than 3.3.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-1010296?

op-tee: upgrade to newer than 3.3.0. Exact commands for each OS are on this page.

Is CVE-2019-1010296 being exploited?

CVE-2019-1010296 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-1010296 affect?

CVE-2019-1010296 affects op-tee. Severity is critical (CVSS 9.8). Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Buffer Overflow. The impact is: Code execution in context of TEE core (kernel). The component is: optee_os. The fixed version is: 3.4.0 and later.

How urgent is CVE-2019-1010296?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

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CVE-2026-44362 MEDIUM 5.5 UPGRADE OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on
CVE-2026-40257 MEDIUM 5.5 UPGRADE OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on
CVE-2026-53763 LOW 3.8 UPGRADE OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on

References

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