CVE & CISA-KEV Catalog

CVE-2022-33747

LOW
3.8
CVSS v3
NVD

Description

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

How to fix

Remediation Available
xenDebian
Fixed in:4.14.5+86-g1c354767d5-1CVE-2022-33747
Fixed in:4.16.2+90-g0d39a6d1ae-1CVE-2022-33747
Fixed in:4.16.2+90-g0d39a6d1ae-1CVE-2022-33747
Fixed in:4.16.2+90-g0d39a6d1ae-1CVE-2022-33747

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityLow

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

Exploit Intelligence

0.26%probability of exploitation in 30 days
17thpercentile

Low risk: more likely to be exploited than 17% of all known CVEs.

References

Related Vulnerabilities

Other CWE-404 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2022-44267Medium6.577%-Fix
CVE-2018-8120High7.074%KEV + Ransom-
CVE-2018-8210High7.825%--
CVE-2018-8639High7.822%KEV + Ransom-
CVE-2023-3206Medium5.319%--
CVE-2018-8450High8.816%--
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.