CVE-2021-34376
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedTrusty contains a vulnerability in the HDCP service TA where bounds checking in command 5 is missing. Improper restriction of operations within the bounds of a memory buffer might lead to denial of service, escalation of privileges, and information disclosure.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA bounds checking vulnerability exists in the Trusty TEE's HDCP (High-bandwidth Digital Content Protection) service Trusted Application (TA), specifically in command handler 5. The missing bounds check allows improper memory operations beyond buffer boundaries, potentially enabling denial of service, privilege escalation, or information disclosure from the trusted execution environment.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 32.5.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify Jetson platformCheck if the system is an Nvidia Jetson device by looking for /proc/device-tree/model or using 'cat /sys/firmware/devicetree/base/model'Affected if The system is not an Nvidia Jetson device, then this CVE does not apply
-
Check Jetson Linux versionRun 'cat /etc/nv_tegra_release' or check the kernel version with 'uname -r' to identify the installed Jetson Linux versionAffected if The version is 32.5.1 or higher (the vulnerability exists in versions prior to 32.5.1)
-
Verify Trusty TEE is enabledCheck if Trusty TEE is active by examining /proc/tee/info or looking for Trusty-related processes/services with 'ps -a | grep -i trusty'Affected if Trusty TEE is not present or not running, the vulnerable HDCP service TA is not loaded
-
Confirm HDCP service is activeCheck for HDCP-related processes, services, or configurations on the system; look in /opt/nvidia/ or /etc/ for HDCP configuration filesAffected if The HDCP (High-bandwidth Digital Content Protection) Trusted Application is not running, the specific vulnerable command handler is not invoked
The system is affected if it is an Nvidia Jetson Linux device running version below 32.5.1 with Trusty TEE and the HDCP service TA enabled and in use.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data32.5.1
Update the device firmware to obtain a patched Trusty HDCP service TA that includes proper bounds validation in command 5; alternatively, if source code is available, add bounds checking before memory operations in the affected command handler.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,656.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-34376 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-34376 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data