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Fencer Vulns
high 7.5

CVE-2024-31143 json

double unlock in x86 guest IRQ handling

published 2024-07-18 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-29053

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

An optional feature of PCI MSI called "Multiple Message" allows a device to use multiple consecutive interrupt vectors. Unlike for MSI-X, the setting up of these consecutive vectors needs to happen all in one go. In this handling an error path could be taken in different situations, with or without a particular lock held. This error path wrongly releases the lock even when it is not currently held.

Patch / fix

  • Xen Xen 4.16
  • xen Debian 12 4.17.5+23-ga4e5191dc0-1
  • xen Debian 14, Debian 13 4.19.1-1

debian advisories DEBIAN-CVE-2024-31143

  • xen SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +5 more 4.16.6_04-150400.4.62.1
  • xen SLE Module for Server Applications 15 SP5, SLE Module for Basesystem 15 SP5, SLE Micro 5.5 +2 more 4.17.4_04-150500.3.33.1
  • xen SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.12.4_50-3.112.1
  • xen SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +3 more 4.14.6_16-150300.3.75.1
  • xen SLE Module for Server Applications 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 4.18.2_06-150600.3.3.1
  • xen SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS 4.13.5_12-150200.3.93.1

suse advisories SUSE-SU-2024:3423-1SUSE-SU-2024:2654-1SUSE-SU-2024:2535-1SUSE-SU-2024:2534-1SUSE-SU-2024:2533-1SUSE-SU-2024:2531-1

  • xen openSUSE Tumbleweed 4.18.2_06-2.1

opensuse advisories openSUSE-SU-2024:14204-1

  • xen Alpine 3.17 4.16.6-r1
  • xen Alpine 3.18 4.17.5-r0
  • xen Alpine 3.20, Alpine 3.19 4.18.3-r0
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 4.19.0-r0

alpine advisories ALPINE-CVE-2024-31143

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-2024-31143 updated

xen: double unlock in x86 guest IRQ handling

  • 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
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% 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:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Xen Xen

Classification

Weakness
  • CWE-832 Unlock of a Resource that is not Locked

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.