CVE-2024-31145: error handling in x86 IOMMU identity mapping
Vulnerability summary
CVE-2024-31145 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in xen. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 14.3% of scored vulnerabilities.
Not severe (CVSS 7.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 10 · Related 8Timeline
- 25-09-2024PublishedVulnerability first disclosed.
- 25-09-2024Last modifiedVulnerability information updated.
Description
Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. In the logic establishing these mappings, error handling was flawed, resulting in such mappings to potentially remain in place when they should have been removed again. Respective guests would then gain access to memory regions which they aren't supposed to have access to.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- NVDNIST7.5HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS trend
Probability
0.23%
Chance of exploitation in the next 30 days
Percentile
14%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.23% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- xen≥ 4.0.0, < 4.16.6-r1 | ≥ 4.0.0, < 4.17.5-r0 | ≥ 4.0.0, < 4.18.3-r0 | ≥ 4.0.0, < 4.19.0-r0
Debian1 product
- xen< 4.17.5+23-ga4e5191dc0-1 | < 4.19.1-1
Ubuntu1 product
- xenAll versions (No fix recorded)
Xen1 product
- xen≥ 4.0.0 (No fix recorded)
4 vendors · 4 products
