Bug 2489170 (CVE-2026-46655) - CVE-2026-46655 virtio-win: viosock.sys: integer overflow in VIOSockSelect leads to heap-based buffer overflow
Summary: CVE-2026-46655 virtio-win: viosock.sys: integer overflow in VIOSockSelect lea...
Keywords:
Status: NEW
Alias: CVE-2026-46655
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-16 12:56 UTC by OSIDB Bzimport
Modified: 2026-06-16 13:09 UTC (History)
7 users (show)

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Description OSIDB Bzimport 2026-06-16 12:56:43 UTC 
A flaw was found in virtio-win. A low-integrity process can issue an IOCTL request to viosock.sys!VIOSockSelect with a maliciously crafted request that causes an integer overflow. This allows the process to circumvent bounds checking, resulting in a heap overflow in the NonPagedPool kernel heap. The flaw could be exploited to escalate privileges on Windows systems running this driver.
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