CVE-2026-21736

Unauthorized writes via incompatible wrapped-memory permissions

Published Mar 9, 2026 · Updated Mar 9, 2026

Permission bypass in Imagination Technologies Graphics DDK 25.1 RTM2 and earlier allows local users to write read-only wrapped memory and files. PhysmemWrapExtMem() accepts GPU system calls that export wrapped user-mode memory with write access incompatible with the source resource's protections. Exploitation requires locally installed, non-privileged software and write-attribute support; the resulting access alters protected user-mode data and files without affecting availability.

CVSS severity4.4
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Permission bypass in Imagination Technologies Graphics DDK 25.1 RTM2 and earlier allows local users to write read-only wrapped memory and files. PhysmemWrapExtMem() accepts GPU system calls that export wrapped user-mode memory with write access incompatible with the source resource's protections. Exploitation requires locally installed, non-privileged software and write-attribute support; the resulting access alters protected user-mode data and files without affecting availability.

The record

CVE
CVE-2026-21736
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
Imagination Technologies
Product
Graphics DDK
Classifications
CWE-280, CAPEC-679
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.17 RTM
  2. Affected versionversion=1.18 RTM
  3. Affected versionversion=23.2 RTM
  4. Affected versionversion=24.1 RTM <=25.1 RTM

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Imagination Technologies · Graphics DDKversion=1.17 RTM; version=1.18 RTM; version=23.2 RTM; version=24.1 RTM <=25.1 RTM

Published CVSS scores

4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-280Improper Handling of Insufficient Permissions or Privileges
CAPEC-679Exploitation of Improperly Configured or Implemented Memory Protections

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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