Bug 2264896 (CVE-2024-26328)

Summary:	CVE-2024-26328 QEMU: NVMe: out-of-bounds memory access in nvme_sriov_pre_write_ctrl()
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, ddepaula, jen, jferlan, jmaloy, kkiwi, knoel, mrezanin, mst, nilal, pbonzini, ymankad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the NVMe emulation support of QEMU. The register_vfs() function in hw/pci/pcie_sriov.c does not set NumVFs to PCI_SRIOV_TOTAL_VF, causing the interaction with hw/nvme/ctrl.c to be mishandled. This issue could lead to out-of-bounds memory access in hw/nvme. This flaw allows a malicious guest to crash QEMU and cause a denial of service condition.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2264898
Bug Blocks:	2264850

Description Mauro Matteo Cascella 2024-02-19 15:24:47 UTC

An issue was discovered in QEMU 7.1.0 through 8.2.1. The register_vfs() function in hw/pci/pcie_sriov.c does not set NumVFs to PCI_SRIOV_TOTAL_VF, and thus interaction with hw/nvme/ctrl.c is mishandled.

References:
https://lore.kernel.org/all/20240213055345-mutt-send-email-mst%40kernel.org/
https://lore.kernel.org/all/20240218-reuse-v5-1-e4fc1c19b5a9@daynix.com/

Comment 1 Mauro Matteo Cascella 2024-02-19 15:30:08 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 2264898]