CVE-2021-34392
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 TLK contains a vulnerability in the NVIDIA TLK kernel where an integer overflow in the tz_map_shared_mem function can bypass boundary checks, which might lead to 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 · moderate confidenceNVIDIA Trusty TLK (Trusted Little Kernel) contains an integer overflow vulnerability in the tz_map_shared_mem function that allows bypassing boundary checks during shared memory mapping operations. This flaw could allow an attacker to corrupt memory boundaries and potentially cause a denial of service condition in 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.
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Identify if the system is an NVIDIA Jetson deviceCheck the hardware platform or review system documentation to confirm the device model is an NVIDIA Jetson product (such as Jetson Nano, Jetson TX2, Jetson Xavier, or Jetson Orin series)Affected if The system is an NVIDIA Jetson device running an affected Jetson Linux version below 32.5.1 and using Trusty TLK as the trusted execution environment
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Determine the installed Jetson Linux versionCheck the Linux kernel version or system release information (typically found in /etc/lsb-release, /proc/version, or using the 'uname -a' command)Affected if The Jetson Linux version is below 32.5.1 (for example, 32.4.x, 32.3.x, or earlier releases)
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Verify Trusty TLK is the active trusted execution environmentReview the TEE configuration or check which trusted execution environment is in use on the Jetson system; Trusty TLK is typically used on NVIDIA Tegra-based Jetson devicesAffected if Trusty TLK is enabled and actively running as the TEE on the system
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Confirm the vulnerable function is presentInspect the Trusty TLK firmware or OS image for the tz_map_shared_mem function in the memory mapping subsystemAffected if The tz_map_shared_mem function exists in the installed Trusty TLK version and the system is running an unpatched version
A user is affected if their Jetson device runs Jetson Linux version below 32.5.1 with Trusty TLK enabled as the trusted execution environment.
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 NVIDIA's security patch for Trusty TLK to fix the integer overflow in tz_map_shared_mem. If no patch is available, review the boundary check logic in the affected function and implement proper overflow validation before memory mapping operations.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-34392 — 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-2021-34392 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
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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