CVE-2021-34377
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 9 is missing. Improper restriction of operations within the bounds of a memory buffer might lead to escalation of privileges, information disclosure, and denial of service.
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 · high confidenceThis is a bounds checking vulnerability in the Trusty secure operating system's HDCP (High-bandwidth Digital Content Protection) Trusted Application. Command 9 in the HDCP service TA lacks proper boundary validation when processing operations within memory buffers, which could allow memory corruption leading to privilege escalation, information disclosure, or denial of service.
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.
-
Confirm Jetson Linux versionCheck the installed Jetson Linux version using 'cat /etc/nv_tegra_release' or 'dpkg -l | grep -i nvidia' and compare the version number to the affected range (less than 32.5.1)Affected if The installed version is below 32.5.1
-
Verify Trusty secure OS is presentCheck for Trusty OS components on the system by looking for Trusty-related files in /vendor or /trusty directories, or by checking kernel cmdline for trusty parametersAffected if Trusty secure OS is running on the device
-
Check if HDCP Trusted Application is loadedInspect the list of loaded Trusted Applications in Trusty by checking /vendor/firmware/ or /trusty/tas/ directories for the HDCP TA binary, or use Trusty-specific diagnostic tools if availableAffected if The HDCP service Trusted Application (hdcp.ta or similar) is present and loaded in Trusty
-
Identify if HDCP service is actively usedReview system services or configurations that reference HDCP functionality, such as display-related services or media pipeline configurations that invoke Command 9 of the HDCP TAAffected if The system has services or configurations that invoke the HDCP Trusted Application
A user is affected if they are running Nvidia Jetson Linux version below 32.5.1 with Trusty secure OS and the HDCP Trusted Application loaded 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
Apply the vendor-supplied Trusty OS/firmware update that patches the HDCP service TA. If unavailable, evaluate disabling the HDCP service or implementing additional input validation at the application layer.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-34377 — 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-2021-34377 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