CVE-2026-42487

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.09% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 0.6% of scored records. A rank, not a probability.

NVD base score

7.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-06-22.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-18 13:46Z4 MO AGO

Last updated

2026-06-18 15:07Z4 MO AGO

Reserved

2026-04-27

Assigning CNA

XEN

Record state

PUBLISHED

Severity

High (CVSS 7.9)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

Weaknesses

• CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class

Data version

5.2

Document digest

e103805624eb65fa837b88f071bd307539e859a713f8b0d6134c71827004981f

• xenbits.xenproject.orghttps://xenbits.xenproject.org/xsa/advisory-491.html
• xenbits.xen.orghttp://xenbits.xen.org/xsa/advisory-491.html
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/06/09/11