PT-2026-48242 · Xen+4 · Xen

Roger Pau · CVE-2026-42488 · Published 2026-06-09 · Updated 2026-06-29

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions The product name cannot be determined (affected versions not specified)

Description Certain shadow paging error paths switch page-tables without updating the currently running vCPU reference. This creates a mismatch between the loaded page-tables and the mapcache metadata, which can result in the corruption of the mapcache.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2026-42488

SUSE-SU-2026:2328-1

SUSE-SU-2026:2329-1

SUSE-SU-2026:2364-1

SUSE-SU-2026:2613-1

SUSE-SU-2026:2668-1

Affected Products

Xen

References · 34

• https://cve.org/CVERecord?id=CVE-2026-42488 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-42488 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-42488 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2328-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2613-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2026-42488 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2329-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-42488 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-42488 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2668-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-42488 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2364-1 · Vendor Advisory
• https://xenbits.xen.org/xsa/advisory-494.html · Note
• https://suse.com/support/update/announcement/2026/suse-su-20262364-1 · Note
• https://security.alpinelinux.org/vuln/CVE-2026-42488 · Note