CVE-2026-45203: Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigg

Q: How do I fix CVE-2026-45203?

ddk: upgrade to 26.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-45203 being exploited?

CVE-2026-45203 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-45203 affect?

CVE-2026-45203 affects ddk. Severity is high (CVSS 7.8). Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel. A TOCTOU bug existed where a malicious driver coul

Routine

HIGH 7.8UPGRADE

CVE-2026-45203 is a high-severity flaw (CVSS 7.8) affecting ddk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel. A TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-367
Published	2026-07-10
Last modified	2026-10-25

Publisher (CNA): imaginationtech · Vendor: imaginationtech

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-10 21:16 UTCPublished CVE record published
2026-10-25 15:10 UTCUpdated Record last modified

imaginationtech ddk UPGRADE

Affected: < 26.1 · 26.1 rtm1

Fixed in: 26.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ddk || rpm -q ddk || ddk --version

2. UPGRADE to 26.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ddk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ddk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-45203?

ddk: upgrade to 26.1. Exact commands for each OS are on this page.

Is CVE-2026-45203 being exploited?

CVE-2026-45203 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-45203 affect?

CVE-2026-45203 affects ddk. Severity is high (CVSS 7.8). Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel. A TOCTOU bug existed where a malicious driver coul

How urgent is CVE-2026-45203?

Priority 28/100. High severity

Related CVEs

CVE-2026-34196 HIGH 7.8 UPGRADE Software installed and run as a non-privileged user may conduct improper GPU system calls to cause an integer
CVE-2026-41154 HIGH 7.8 UPGRADE Software installed and run as a non-privileged user may cause OOB kernel memory reads or writes through GPU AP
CVE-2026-7639 HIGH 7.8 UPGRADE Software installed and run as a non-privileged user may conduct a sequence of improper GPU system calls causin
CVE-2026-45196 HIGH 7.8 UPGRADE Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigg
CVE-2026-16280 CRITICAL 9.8 UPGRADE An integer overflow when calculating physical offsets for sparse PMRs may result in 32-bit truncation of addre

References

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