A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly validate the size of input descriptors before writing data. A malicious guest with high privileges could exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds write in the host heap memory and a potential denial of service (DoS) for the QEMU process.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3038-1 advisory.

    This update for qemu fixes the following issues

    - CVE-2026-3886: QEMU calc_image_hostmem Integer Overflow Local Privilege Escalation Vulnerability     (bsc#1268061).
    - CVE-2026-48004: heap use-after-free race condition allows a DoS by an unprivileged guest user     (bsc#1270133).
    - CVE-2026-48914: qemu-kvm: Heap Buffer Overflow in virtio-blk SCSI Request Handling (bsc#1268794).

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

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

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-39311 advisory.

    [10.1.0-17.el9_8.4]
    - kvm-virtio-blk-add-missing-VIRTIO_BLK_T_SCSI_CMD-size-ch.patch [RHEL-184527]
    - Resolves: RHEL-184527       (CVE-2026-48914 qemu-kvm: Heap buffer overflow in virtio-blk SCSI request handling [rhel-9.8.z])

Tenable has extracted the preceding description block directly from the Oracle Linux 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 remote RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:39311 advisory.

    * qemu-kvm: Heap buffer overflow in virtio-blk SCSI request handling (CVE-2026-48914)

Tenable has extracted the preceding description block directly from the RockyLinux 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 remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:39311 advisory.

    Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm packages provide the user-space component for running virtual machines that     use KVM.

    Security Fix(es):

    * qemu-kvm: Heap buffer overflow in virtio-blk SCSI request handling (CVE-2026-48914)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21253-1 advisory.

    Update to version 10.0.11.

    Security issues fixed:

    - CVE-2026-3886: integer overflow leading to privilege escalation due to lack of proper validation of     user-supplied       data in the virtio-gpu driver (bsc#1268061).
    - CVE-2026-48914: heap buffer overflow due to improper size validation in virtio-blk SCSI request handling       (bsc#1268794).
    - CVE-2026-48004: heap use-after-free race condition due to missing rename lock in v9fs_co_readdir_many     (bsc#1270133).

    Other updates and bugfixes:

    - Version 10.0.11:
      * Full backport list here: https://lore.kernel.org/qemu-     devel/20260627082646.D825717AB67@think4mjt.localdomain/
    - Version 10.0.10:
      * Full backport list here: https://lore.kernel.org/qemu-     devel/20260528061820.CEE521691A9@think4mjt.localdomain/
    - ppc/spapr: Skip system reset for quiesced CPUs (bsc#1268279).
    - i386/tdx: handle TDG.VP.VMCALL <GetQuote> (jsc#PED-9266).
    - i386/tdx: handle TDG.VP.VMCALL <GetTdVmCallInfo> (jsc#PED-9266).
    - update Linux headers to v6.16-rc3 (jsc#PED-9266).
    - i386/cpu: Warn about why CPUID_EXT_PDCM is not available (jsc#PED-9266).
    - i386/cpu: Move adjustment of CPUID_EXT_PDCM before feature_dependencies[] check (jsc#PED-9266).
    - [openSUSE] qemu-ga: fix service file against no-autostart (bsc#1199023).

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

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

The version of qemu installed on the remote host is prior to 3.1.0-8. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3793 advisory.

    A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly     validate the size of input descriptors before writing data. A malicious guest with high privileges could     exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds     write in the host heap memory and a potential denial of service (DoS) for the QEMU process.
    (CVE-2026-48914)

Tenable has extracted the preceding description block directly from the tested product 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.

  - A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly     validate the size of input descriptors before writing data. A malicious guest with high privileges could     exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds     write in the host heap memory and a potential denial of service (DoS) for the QEMU process.
    (CVE-2026-48914)

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

ID	Name	Product	Family	Severity
327329	SUSE SLED15: qemu / qemu-SLOF / qemu-accel-qtest / qemu-accel-tcg-x86 / qemu-arm / etc (SUSE-SU-2026:3038-1)	Nessus	SuSE Local Security Checks	high
327037	Oracle Linux 9 : qemu-kvm (ELSA-2026-39311)	Nessus	Oracle Linux Local Security Checks	medium
326987	RockyLinux 9 : qemu-kvm (RLSA-2026:39311)	Nessus	Rocky Linux Local Security Checks	medium
326984	RHEL 9 : qemu-kvm (RHSA-2026:39311)	Nessus	Red Hat Local Security Checks	medium
326027	openSUSE 16: qemu / qemu-SLOF / qemu-accel-qtest / qemu-arm / qemu-audio-alsa / etc (openSUSE-SU-2026:21253-1)	Nessus	SuSE Local Security Checks	high
325576	Amazon Linux 2 : qemu, --advisory ALAS2-2026-3793 (ALAS-2026-3793)	Nessus	Amazon Linux Local Security Checks	medium
320830	Linux Distros Unpatched Vulnerability : CVE-2026-48914	Nessus	Misc.	medium

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