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Fencer Vulns
high 7.5

CVE-2025-58148 json

x86: Incorrect input sanitisation in Viridian hypercalls

published 2025-10-31 12 mo ago modified 2026-10-19 20 d ago also EUVD-2025-37344

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

[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.

Patch / fix

  • xen Debian 12 4.17.5+72-g01140da4e8-1
  • xen Debian 13 4.20.2+7-g1badcf5035-0+deb13u1
  • xen Debian 14 4.20.2+7-g1badcf5035-1

debian advisories DEBIAN-CVE-2025-58148

  • xen SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Server Applications 15 SP6 +2 more 4.18.5_08-150600.3.34.2
  • xen SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +5 more 4.16.7_04-150400.4.75.1
  • xen SLE Module for Server Applications 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 4.18.5_06-150600.3.31.2
  • xen SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 4.17.5_12-150500.3.53.1
  • xen SLE Module for Server Applications 15 SP7, SLE Module for Basesystem 15 SP7 4.20.1_06-150700.3.14.1

suse advisories SUSE-SU-2026:0012-1SUSE-SU-2025:3843-1SUSE-SU-2025:3798-1SUSE-SU-2025:3797-1SUSE-SU-2025:3793-1

  • xen Alpine 3.20, Alpine 3.19 4.18.5-r3
  • xen Alpine 3.21 4.19.3-r2
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 4.20.1-r2

alpine advisories ALPINE-CVE-2025-58148

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-58148 updated cvss 8.1

xen: x86: Incorrect input sanitisation in Viridian hypercalls

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Xen Xen

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.