5.5

CVE-2024-45819: libxl leaks data to PVH guests via ACPI tables

Analyzed
AliasesALPINE-CVE-2024-45819UBUNTU-CVE-2024-45819DEBIAN-CVE-2024-45819
Published 19-12-2024Last modified 31-12-2024

Vulnerability summary

CVE-2024-45819 is a medium (CVSS 5.5) Incorrect Default Permissions vulnerability in xen. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 22.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 7
DSA-5836-1MGASA-2025-0270OPENSUSE-SU-2024:14530-1SUSE-SU-2024:3977-1SUSE-SU-2024:3979-1SUSE-SU-2024:3980-1

Timeline

  1. 19-12-2024
    PublishedVulnerability first disclosed.
  2. 31-12-2024
    Last modifiedVulnerability information updated.

Description

PVH guests have their ACPI tables constructed by the toolstack. The construction involves building the tables in local memory, which are then copied into guest memory. While actually used parts of the local memory are filled in correctly, excess space that is being allocated is left with its prior contents.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.30% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • xen≥ 4.8.0, < 4.16.6-r3 | ≥ 4.8.0, < 4.17.5-r2 | ≥ 4.8.0, < 4.18.3-r2 | ≥ 4.8.0, < 4.19.0-r1
Debian1 product
  • xen< 4.17.5+23-ga4e5191dc0-1 | < 4.19.1-1
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product
  • xen≥ 4.8.0 (No fix recorded)

4 vendors · 4 products

References

10 links