CVE-2026-41156
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 · uneditedSoftware installed and run as a non-privileged user may conduct improper GPU system calls to cause mismanagement of resources creating a write use after free scenario. A shared resource (memory page) managed by a CPU thread of control (driver) and accessed by a GPU thread of control (Firmware) can cause a write UAF when the CPU thread frees the resource before the GPU FW has finished accessing it.
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 write use-after-free vulnerability exists in GPU driver and firmware interaction where a shared memory page managed by the CPU driver thread can be freed before the GPU firmware finishes accessing it, due to improper synchronization when a non-privileged user makes GPU system calls.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/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.
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Identify GPU hardware and driver in useRun commands such as 'lspci | grep -i vga' or 'lshw -C video' to list GPU hardware, and check the loaded kernel modules with 'lsmod' or review /proc/driver/ for driver version informationAffected if A GPU driver is loaded but the version cannot be determined or is unknown
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Determine installed GPU driver versionCheck the driver version through vendor-specific tools (nvidia-smi for NVIDIA, cat /sys/class/drm/card*/device/version for open-source drivers) or review the kernel module version with 'modinfo <driver_name>'Affected if The driver version is lower than the fixed version or cannot be determined (unknown versions may indicate unpatched state)
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Verify GPU system call access for non-privileged usersCheck if non-privileged users can access GPU device nodes (ls -l /dev/dri/* or /dev/nvidia*) and review GPU driver permissions with 'getent group video' or similar group membership checksAffected if Non-privileged users have direct access to GPU device nodes without proper restrictions
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Confirm shared memory interaction between CPU driver and GPU firmwareReview GPU driver source code or documentation for shared memory page management, or monitor driver behavior during GPU operations using tools like 'strace' on GPU system callsAffected if The driver creates shared memory buffers for GPU firmware interaction but synchronization primitives are not visibly implemented or documented
A user is affected if they are running a GPU driver with known vulnerable versions where non-privileged users can trigger GPU system calls that involve shared memory pages freed prematurely due to missing synchronization between CPU driver thread and GPU firmware.
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 dataImplement proper synchronization primitives (memory barriers, locks, or reference counting) in the GPU driver to ensure shared memory pages are not freed while GPU firmware still holds active references.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-41156 — 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-2026-41156 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
- No weaponised exploit code, or anything meant to cause harm
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