virtio-win provides Windows paravirtualized drivers for QEMU and KVM. From mm210 until mm320, the Viosock driver permits a low-privilege local process to submit an IOCTL_SELECT request with attacker-controlled VIRTIO_VSOCK_SELECT.Fdss[*].fd_count values that overflow the 32-bit sum used by VIOSockSelect for bounds checking. The wrapped sum can pass the FD_SETSIZE check even though an individual descriptor count is much larger than the expected limit. VIOSockSelectCopyFds then iterates using the unchecked count and writes beyond the allocated pPkt->Fds array in the NonPagedPool kernel heap. Successful exploitation can corrupt kernel memory and enable privilege escalation in a Windows guest running the driver. This issue is fixed in mm320.

The Rocky Linux 9 host has a package installed that is affected by a vulnerability as referenced in the CIQ crlba-2026_70252 advisory.

    The virtio-win package provides paravirtualized network drivers for most     Microsoft Windows operating systems. Paravirtualized drivers are     virtualization-aware drivers used by fully virtualized guests running on Rocky Enterprise Software     Foundation     Enterprise Linux. Fully virtualized guests using the paravirtualized drivers     gain significantly better I/O performance than fully virtualized guests running     without the drivers.

    This advisory is provided by Ctrl IQ, Inc for Rocky Linux systems. For more information about CIQ security     practices, visit https://ciq.com/security.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Rocky Linux 9 host has a package installed that is affected by a vulnerability as referenced in the CIQ crlba-2026_56986 advisory.

    The virtio-win package provides paravirtualized network drivers for most Microsoft Windows operating     systems. Paravirtualized drivers are virtualization-aware drivers used by fully virtualized guests running     on Rocky Linux. Fully virtualized guests using the paravirtualized drivers gain significantly better I/O     performance than fully virtualized guests running without the drivers.

    This advisory is provided by Ctrl IQ, Inc for Rocky Linux systems. For more information about CIQ security     practices, visit https://ciq.com/security.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Rocky Linux 10.2 host has a package installed that is affected by a vulnerability as referenced in the CIQ crlba-2026_43594 advisory.

    The virtio-win package provides paravirtualized network drivers for most Microsoft Windows operating     systems. Paravirtualized drivers are virtualization-aware drivers used by fully virtualized guests running     on Rocky Linux. Fully virtualized guests using the paravirtualized drivers gain significantly better I/O     performance than fully virtualized guests running without the drivers.

    Bug Fix(es) and Enhancement(s):

    * [virtio-win][viogpu] Reject resolutions exceeding framebuffer segment capacity [rhel-10.2.z] (JIRA:Rocky     Linux-192315)

    * Someone driver works with debug level >= 6 (debug message flood) [rhel-10.2.z] (JIRA:Rocky Linux-192589)

    * Virtio-win may not configure guest cache mode when using virtio-blk [rhel-10.2.z] (JIRA:Rocky     Linux-192590)

    * [virtio-win] NetKVM (virtio-win 0.1.285) does not transmit USO packets correctly [rhel-10.2.z]     (JIRA:Rocky Linux-192591)

    * viosock: Validate fd_count in VIOSockSelect against overflow and empt? [rhel-10.2.z] (JIRA:Rocky     Linux-192592)

    * [Windows]Can not connect to VM via vsock after migration [rhel-10.2.z] (JIRA:Rocky Linux-192594)

    * [virtio-win][viogpu] Provide a way to set a custom screen resolution [rhel-10.2.z] (JIRA:Rocky     Linux-192595)

    * [viogpudo] VM crashes with BSOD/black screen when setting invalid resolution values [rhel-10.2.z]     (JIRA:Rocky Linux-192596)

    * netkvm: treat temporary TX queue full as retry, not drop [rhel-10.2.z] (JIRA:Rocky Linux-192610)

    * viosock: Fix spec compliance issues in WSP library and socket driver [rhel-10.2.z] (JIRA:Rocky     Linux-192611)

    This advisory is provided by Ctrl IQ, Inc for Rocky Linux systems. For more information about CIQ security     practices, visit https://ciq.com/security.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - virtio-win provides Windows paravirtualized drivers for QEMU and KVM. From mm210 until mm320, the Viosock     driver permits a low-privilege local process to submit an IOCTL_SELECT request with attacker-controlled     VIRTIO_VSOCK_SELECT.Fdss[*].fd_count values that overflow the 32-bit sum used by VIOSockSelect for bounds     checking. The wrapped sum can pass the FD_SETSIZE check even though an individual descriptor count is much     larger than the expected limit. VIOSockSelectCopyFds then iterates using the unchecked count and writes     beyond the allocated pPkt->Fds array in the NonPagedPool kernel heap. Successful exploitation can corrupt     kernel memory and enable privilege escalation in a Windows guest running the driver. This issue is fixed     in mm320. (CVE-2026-46655)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
377514	Rocky Linux 9 [CIQ] Security Update: virtio-win (crlba-2026_70252)	Nessus	Rocky Linux Local Security Checks	Local	high
376976	Rocky Linux 9 [CIQ] Security Update: virtio-win (crlba-2026_56986)	Nessus	Rocky Linux Local Security Checks	Local	high
376426	Rocky Linux 10.2 [CIQ] Security Update: virtio-win (crlba-2026_43594)	Nessus	Rocky Linux Local Security Checks	Local	high
321216	Linux Distros Unpatched Vulnerability : CVE-2026-46655	Nessus	Misc.	Local	high

Detections

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CVE-2026-46655

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Tenable Plugins

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