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Fencer Vulns
medium 4.1

CVE-2023-46840 json

VT-d: Failure to quarantine devices in !HVM builds

published 2024-03-20 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-51006

cvss
4.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

Incorrect placement of a preprocessor directive in source code results in logic that doesn't operate as intended when support for HVM guests is compiled out of Xen.

Patch / fix

  • xen Debian 12 4.17.3+10-g091466ba55-1~deb12u1
  • xen Debian 14, Debian 13 4.17.3+10-g091466ba55-1

debian advisories DEBIAN-CVE-2023-46840

  • xen SLE Module for Server Applications 15 SP5, SLE Module for Basesystem 15 SP5, SLE Micro 5.5 +1 more 4.17.3_06-150500.3.24.1
  • xen SLE Module for Server Applications 15 SP5, SLE Module for Basesystem 15 SP5, SLE Micro 5.5 +1 more 4.17.3_04-150500.3.21.1

suse advisories SUSE-SU-2024:0830-1SUSE-SU-2024:0266-1

  • xen openSUSE Tumbleweed 4.18.0_06-1.1

opensuse advisories openSUSE-SU-2024:13648-1

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-2023-46840 updated cvss 6.1

xen: Failure to quarantine devices in !HVM builds

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present “This vulnerability doesn't impact any supported Red Hat product.”

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
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.1 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
CNA 3.1 4.1 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

Affected products

  • Xen Xen

Classification

Weakness
  • CWE-670 Always-Incorrect Control Flow Implementation

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.