GPU DDK - DevmemIntGetReservationData does not ref the PMR it returns
Software installed and run as a non-privileged user may conduct improper GPU system calls to cause mismanagement of reference counting to cause a potential use after free. Improper reference counting on an internal resource caused scenario where potential for use after free was present.
- Published
- Jan 13, 2026
- Updated
- Jun 17, 2026
- EPSS
- 0.1% · 2th percentile
- CWE
- CWE-416
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| imaginationtech | ddk | cpe:2.3:a:imaginationtech:ddk |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- imaginationtech ddkbefore 25.3
Versions reported by the vendor
Affected version ranges reported by the assigning authority (imaginationtech). Independent of NVD's CPE analysis and usually ahead of it.
Imagination Technologies Graphics DDK
- 25.3 RTMnot affected
- 1.15 RTM, 1.17 RTM, 1.18 RTMaffected
- 23.2 RTM and later · up to and including 25.2 RTMaffected
Same product
imaginationtech: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-16280GPU DDK - Integer overflow in _PMRLogicalOffsetToPhysicalOffset39Monitor
- CVE-2025-13952GPU DDK - libusc UAF via WebGPU shaders at MergeConsecutiveBarriersBP39Monitor
- CVE-2026-21732GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation38Monitor
- CVE-2025-25176GPU DDK - GPU Register value contents leaked from secure workloads to non-secure world36Monitor
- CVE-2025-58411GPU DDK - Reservation::psMappedPMR can change while used by a freelist -> UAF35Monitor
- CVE-2026-22166GPU DDK - Write UAF in KEGLGetPoolBuffers, WebGL reachable32Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2025-1395210 days apartGPU DDK - libusc UAF via WebGPU shaders at MergeConsecutiveBarriersBP39Monitor
- CVE-2025-584110 days apartGPU DDK - Reservation::psMappedPMR can change while used by a freelist -> UAF35Monitor
- CVE-2026-22165108 days apartGPU DDK - UAF read of GLES3Context::psDrawParams and GLES3Context::psMode and UAF read/write of RMJob::apsCCBs32Monitor
- CVE-2026-22166108 days apartGPU DDK - Write UAF in KEGLGetPoolBuffers, WebGL reachable32Monitor
- CVE-2026-34196178 days apartGPU DDK - UAF read and/or write of arbitrary physical memory due to integer truncation in PMRDevPhysAddrOSMem31Monitor
- CVE-2026-49743192 days apartGPU DDK - Write UAF of sync checkpoint in GPU kick function after export fence file descriptor is prematurely closed31Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-416 · Use After FreeCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Root cause
After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.
The bug in code
The whole CWE-416 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);Fixed
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.