How severe is CVE-2026-21733?

CVE-2026-21733 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2026-21733 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21733?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-21733 have an EU (EUVD) identifier?

Yes. CVE-2026-21733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23446.

When was CVE-2026-21733 published?

CVE-2026-21733 was published on 2026-04-17 and last updated on 2026-06-26.

CVE-2026-21733

CVE-2026-21733 is a high-severity vulnerability with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-280.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23446
Weakness: CWE-280
Published: 2026-04-17
Last modified: 2026-06-26

Description

Software installed and run as a non-privileged user may conduct improper GPU system calls to gain write permission to read-only wrapped user-mode memory and files. This is caused by improper handling of GPU memory reservation protections.

Frequently asked questions

What is CVE-2026-21733?: Software installed and run as a non-privileged user may conduct improper GPU system calls to gain write permission to read-only wrapped user-mode memory and files. This is caused by improper handling of GPU memory reservation protections.
How severe is CVE-2026-21733?: CVE-2026-21733 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2026-21733 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-21733?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-21733 have an EU (EUVD) identifier?: Yes. CVE-2026-21733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23446.
When was CVE-2026-21733 published?: CVE-2026-21733 was published on 2026-04-17 and last updated on 2026-06-26.

References

https://www.imaginationtech.com/gpu-driver-vulnerabilities/

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