Linux Kernel up to 6.1.140/6.6.92/6.12.30/6.14.8 MSI iommu_dma_prepare_msi allocation of resources

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4.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.1.140/6.6.92/6.12.30/6.14.8 and classified as problematic. Affected is the function iommu_dma_prepare_msi of the component MSI. Performing a manipulation results in allocation of resources. This vulnerability is identified as CVE-2025-38062. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.1.140/6.6.92/6.12.30/6.14.8. This affects the function iommu_dma_prepare_msi of the component MSI. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie The IOMMU translation for MSI message addresses has been a 2-step process, separated in time: 1) iommu_dma_prepare_msi(): A cookie pointer containing the IOVA address is stored in the MSI descriptor when an MSI interrupt is allocated. 2) iommu_dma_compose_msi_msg(): this cookie pointer is used to compute a translated message address. This has an inherent lifetime problem for the pointer stored in the cookie that must remain valid between the two steps. However, there is no locking at the irq layer that helps protect the lifetime. Today, this works under the assumption that the iommu domain is not changed while MSI interrupts being programmed. This is true for normal DMA API users within the kernel, as the iommu domain is attached before the driver is probed and cannot be changed while a driver is attached. Classic VFIO type1 also prevented changing the iommu domain while VFIO was running as it does not support changing the "container" after starting up. However, iommufd has improved this so that the iommu domain can be changed during VFIO operation. This potentially allows userspace to directly race VFIO_DEVICE_ATTACH_IOMMUFD_PT (which calls iommu_attach_group()) and VFIO_DEVICE_SET_IRQS (which calls into iommu_dma_compose_msi_msg()). This potentially causes both the cookie pointer and the unlocked call to iommu_get_domain_for_dev() on the MSI translation path to become UAFs. Fix the MSI cookie UAF by removing the cookie pointer. The translated IOVA address is already known during iommu_dma_prepare_msi() and cannot change. Thus, it can simply be stored as an integer in the MSI descriptor. The other UAF related to iommu_get_domain_for_dev() will be addressed in patch "iommu: Make iommu_dma_prepare_msi() into a generic operation" by using the IOMMU group mutex.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-38062 since 04/16/2025. The exploitability is told to be difficult. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 241773 (Amazon Linux 2023 : bpftool, kernel6.12, kernel6.12-modules-extra (ALAS2023-2025-1052)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.141, 6.6.93, 6.12.31 or 6.14.9 eliminates this vulnerability. Applying the patch e4d3763223c7b72ded53425207075e7453b4e3d5/ba41e4e627db51d914444aee0b93eb67f31fa330/53f42776e435f63e5f8e61955e4c205dbfeaf524/856152eb91e67858a09e30a7149a1f29b04b7384/1f7df3a691740a7736bbc99dc4ed536120eb4746 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (241773) and CERT Bund (WID-SEC-2025-1350). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Dell Avamar
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 241773
Nessus Name: Amazon Linux 2023 : bpftool, kernel6.12, kernel6.12-modules-extra (ALAS2023-2025-1052)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.1.141/6.6.93/6.12.31/6.14.9
Patch: e4d3763223c7b72ded53425207075e7453b4e3d5/ba41e4e627db51d914444aee0b93eb67f31fa330/53f42776e435f63e5f8e61955e4c205dbfeaf524/856152eb91e67858a09e30a7149a1f29b04b7384/1f7df3a691740a7736bbc99dc4ed536120eb4746

Timelineinfo

04/16/2025 🔍
06/18/2025 +63 days 🔍
06/18/2025 +0 days 🔍
02/18/2026 +245 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38062 (🔍)
GCVE (CVE): GCVE-0-2025-38062
GCVE (VulDB): GCVE-100-312861
CERT Bund: WID-SEC-2025-1350 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 06/18/2025 12:04
Updated: 02/18/2026 20:07
Changes: 06/18/2025 12:04 (58), 07/11/2025 13:54 (2), 12/19/2025 00:31 (12), 02/18/2026 20:07 (7)
Complete: 🔍
Cache ID: 216::103

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