How severe is CVE-2026-28529?

CVE-2026-28529 has a CVSS 4.0 base score of 8.5, rated high severity.

Is CVE-2026-28529 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-28529?

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-2026-28529 have an EU (EUVD) identifier?

Yes. CVE-2026-28529 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15408.

When was CVE-2026-28529 published?

CVE-2026-28529 was published on 2026-03-25 and last updated on 2026-06-17.

CVE-2026-28529

CVE-2026-28529 is a high-severity vulnerability with a CVSS 4.0 base score of 8.5. 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-416.

Key facts

Severity: High (CVSS 4.0 base score 8.5)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-15408
Weakness: CWE-416
Published: 2026-03-25
Last modified: 2026-06-17

Description

cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.

Frequently asked questions

What is CVE-2026-28529?: cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.
How severe is CVE-2026-28529?: CVE-2026-28529 has a CVSS 4.0 base score of 8.5, rated high severity.
Is CVE-2026-28529 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-28529?: 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-2026-28529 have an EU (EUVD) identifier?: Yes. CVE-2026-28529 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15408.
When was CVE-2026-28529 published?: CVE-2026-28529 was published on 2026-03-25 and last updated on 2026-06-17.

References

Other CWE-416 (Use After Free) vulnerabilities

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CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

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