CVE-2026-42487

HVM guest I/O port accesses are subject to either emulation or at least translation. Translations are managed by the device model (via XEN_DOMCTL_ioport_mapping), and hence the linked list used may changed at any time. Traversal of those lists (while handling guest I/O port accesses) therefore needs synchronizing with updates, which was missing so far.

• CWE-362

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

Published

Jun 18, 2026

Last Modified

Jun 22, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-42481Open CASCADE Technology (OCCT) V8_0_0_rc5 contains multiple …5.5
• CVE-2026-42482A stack-based buffer overflow in mangle_to_hex_lower() and m…9.8
• CVE-2026-42483A heap-based buffer overflow in the Kerberos hash parser in …9.8
• CVE-2026-42484A heap-based buffer overflow in hex_to_binary in the PKZIP h…9.8
• CVE-2026-42485AGL agl-service-can-low-level contains a stack buffer overfl…7.5
• CVE-2026-42486[This CNA information record relates to multiple CVEs; the t…9.4
• CVE-2026-42488Some shadow paging errors paths will switch the page-tables …8.1
• CVE-2026-42489[This CNA information record relates to multiple CVEs; the t…5.3
• CVE-2026-4249The throttling event handling mechanism in multiple WSO2 pro…8.6
• CVE-2026-42490[This CNA information record relates to multiple CVEs; the t…6.5
• CVE-2026-42492Xenstore, to have an up-to-date picture of the entire system…7.5
• CVE-2026-42493Addressing certain issues, in particular related to operatio…7.5