Bug 2264844 (CVE-2024-26327) - CVE-2024-26327 QEMU: SR-IOV: improper validation of NumVFs leads to buffer overflow
Summary: CVE-2024-26327 QEMU: SR-IOV: improper validation of NumVFs leads to buffer ov...
Keywords:
Status: NEW
Alias: CVE-2024-26327
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
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Depends On: 2264845
Blocks: 2264850
TreeView+ depends on / blocked
 
Reported: 2024-02-19 09:26 UTC by Mauro Matteo Cascella
Modified: 2024-02-19 13:13 UTC (History)
12 users (show)

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A flaw was found in the SR/IOV emulation support of QEMU. The register_vfs() function in hw/pci/pcie_sriov.c mishandled the situation where a guest writes NumVFs greater than TotalVFs, leading to a buffer overflow in VF (Virtual Function) implementations. This flaw allows a malicious guest to crash QEMU and cause a denial of service condition.
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Description Mauro Matteo Cascella 2024-02-19 09:26:28 UTC 
An issue was discovered in QEMU 7.1.0 through 8.2.1. The register_vfs() function in hw/pci/pcie_sriov.c mishandles the situation where a guest writes NumVFs greater than TotalVFs, leading to a buffer overflow in VF implementations.

Reference:
https://lore.kernel.org/all/20240214-reuse-v4-5-89ad093a07f4@daynix.com/
Comment 1 Mauro Matteo Cascella 2024-02-19 09:37:11 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 2264845]
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