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Test your applicationsUpgrade SLES:15.4 xen-tools-domU to version 4.16.7_04-150400.4.75.1 or higher.
Note: Versions mentioned in the description apply only to the upstream xen-tools-domU package and not the xen-tools-domU package as distributed by SLES.
See How to fix? for SLES:15.4 relevant fixed versions and status.
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause out-of-bounds reads and writes while processing the inputs.
CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can cause vpmask_set() to write out of bounds when converting the bitmap to Xen's format.
CVE-2025-58148. Hypercalls using any input format can cause send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild vCPU pointer.