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 AlmaLinux 10 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:58571 advisory.

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


    Bug Fix(es) and Enhancement(s):

      * qemu-kvm hung during drain after double pause [almalinux-10.2.z] (JIRA:AlmaLinux-190702)
      * qemu-img create/convert fails on target block device with 4k sector size [almalinux-10.2.z]     (JIRA:AlmaLinux-207389)

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

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

According to the versions of the qemu packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    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 EulerOS Virtualization qemu 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 Oracle Linux 10 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-58571 advisory.

    [10.1.0-16.el10_2.5]
    - kvm-file-posix-populate-pwrite_zeroes_alignment.patch [RHEL-207389]
    - kvm-block-use-pwrite_zeroes_alignment-when-writing-first.patch [RHEL-207389]
    - kvm-iotests-add-Linux-loop-device-image-creation-test.patch [RHEL-207389]
    - Resolves: RHEL-207389       (qemu-img create/convert fails on target block device with 4k sector size [rhel-10.2.z])

    [10.1.0-16.el10_2.4]
    - kvm-blkdebug-Add-delay-ns-option.patch [RHEL-190702]
    - kvm-block-Add-blk_co_start-end_request-and-BDRV_REQ_NO_Q.patch [RHEL-190702]
    - kvm-block-Add-flags-parameter-to-blk_-_pdiscard.patch [RHEL-190702]
    - kvm-ide-Minimal-fix-for-deadlock-between-TRIM-and-drain.patch [RHEL-190702]
    - kvm-ide-Clean-up-ide_trim_co_entry-to-be-idiomatic-corou.patch [RHEL-190702]
    - kvm-ide-test-Factor-out-wait_dma_completion.patch [RHEL-190702]
    - kvm-ide-test-Test-reset-during-TRIM.patch [RHEL-190702]
    - kvm-spec-Install-qtests-into-qemu-kvm-tests-package.patch [RHEL-190702]
    - Resolves: RHEL-190702       (qemu-kvm hung during drain after double pause [rhel-10.2.z])

    [10.1.0-16.el10_2.3]
    - kvm-virtio-blk-add-missing-VIRTIO_BLK_T_SCSI_CMD-size-ch.patch [RHEL-184529]
    - Resolves: RHEL-184529       (CVE-2026-48914 qemu-kvm: Heap buffer overflow in virtio-blk SCSI request handling [rhel-10.2.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 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:58571 advisory.

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

    Bug Fix(es) and Enhancement(s):

    * qemu-kvm hung during drain after double pause [rhel-10.2.z] (JIRA:Rocky Linux-190702)

    * qemu-img create/convert fails on target block device with 4k sector size [rhel-10.2.z] (JIRA:Rocky     Linux-207389)

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 Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-500220 advisory.

    - tests/9p: add 3 xattr FID limit test cases (local fs driver) (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - tests/9p: add 3 xattr FID limit test cases (synth fs driver) (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - tests/9p: add virtio_9p_add_synth_driver_args() test client function (Christian Schoenebeck) [Orabug:
    39636027] {CVE-2026-8348}
    - tests/9p: increase P9_MAX_SIZE for test client (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - hw/9pfs: add xattr count query interface to fs synth driver (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - hw/9pfs: enable xattr (mockup) support for synth fs driver (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - tests/9p: add Txattrcreate / Rxattrcreate test client functions (Christian Schoenebeck) [Orabug:
    39636027] {CVE-2026-8348}
    - tests/9p: add Tclunk / Rclunk test client functions (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - tests/9p: add Tread / Rread test client functions (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - qemu-options: document 9pfs max_xattr option (Christian Schoenebeck) [Orabug: 39636027] {CVE-2026-8348}
    - hw/9pfs: add max_xattr option (Christian Schoenebeck) [Orabug: 39636027] {CVE-2026-8348}
    - hw/9pfs: add xattr FID limit to prevent memory exhaustion (Christian Schoenebeck) [Orabug: 39636027]     {CVE-2026-8348}
    - hw/9pfs: cap Treaddir allocation (CVE-2026-9238) (Christian Schoenebeck) [Orabug: 39601986]     {CVE-2026-9238}
    - 9pfs/xen: implement response_buffer_size callback (Christian Schoenebeck) [Orabug: 39601986]     {CVE-2026-9238}
    - 9pfs/virtio: implement response_buffer_size callback (Christian Schoenebeck) [Orabug: 39601986]     {CVE-2026-9238}
    - hw/9pfs: add response_buffer_size transport callback (Christian Schoenebeck) [Orabug: 39601986]     {CVE-2026-9238}
    - hw/9pfs: cap negotiated msize to transport limit (Christian Schoenebeck) [Orabug: 39601986]     {CVE-2026-9238}
    - 9pfs/xen: implement msize_limit callback (Christian Schoenebeck) [Orabug: 39601986] {CVE-2026-9238}
    - 9pfs/virtio: implement msize_limit callback (Christian Schoenebeck) [Orabug: 39601986] {CVE-2026-9238}
    - hw/9pfs: add msize_limit transport callback (Christian Schoenebeck) [Orabug: 39601986] {CVE-2026-9238}
    - 9pfs: fix missing rename lock in v9fs_co_readdir_many (CVE-2026-48004) (sin99xx) [Orabug: 39478419]     {CVE-2026-48004}
    - tests/qtest/libqos: add qvirtqueue_reset_pool() for descriptor pool reset (Christian Schoenebeck)     [Orabug: 39636027] {CVE-2026-8348}
    - libvduse: fix buffer overflow in vduse_queue_read_indirect_desc() (Stefano Garzarella) [Orabug:
    39447322] {CVE-2026-6425}
    - libvhost-user: fix buffer overflow in virtqueue_read_indirect_desc() (Stefano Garzarella) [Orabug:
    39447322] {CVE-2026-6425}
    - virtio-blk: add missing VIRTIO_BLK_T_SCSI_CMD size check (CVE-2026-48914) (Stefan Hajnoczi) [Orabug:
    39522394] {CVE-2026-48914}
    - ui: fix validation of VNC extended clipboard data length (Heechan Kang) [Orabug: 39442988]     {CVE-2026-8343}
    - ui/vnc: fix OOB read updating VNC update frequency stats (Daniel P. Berrange) [Orabug: 39447326]     {CVE-2026-48003}
    - ui/vnc: fix OOB write in lossy rect worker code (Daniel P. Berrange) [Orabug: 39447332] {CVE-2026-48002}
    - ui/vnc: fix OOB write in VNC stats array (Daniel P. Berrange) [Orabug: 39447332] {CVE-2026-48002}
    - lsi53c895a: keep a reference to the device while SCRIPTS execute (Paolo Bonzini) [Orabug: 37517793]     {CVE-2024-6519}
    - hw/scsi/lsi53c895a: fix memory leak in lsi_scsi_realize() (Zheng Huang) [Orabug: 37517793]     {CVE-2024-6519}
    - hw/scsi/lsi53c895a: bump instruction limit in scripts processing to fix regression (Fiona Ebner)     [Orabug: 37517793] {CVE-2024-6519}
    - hw/scsi/lsi53c895a: add timer to scripts processing (Sven Schnelle) [Orabug: 37517793] {CVE-2024-6519}
    - virtio-scsi: pass the same cdb_size to virtio_scsi_pop_req and virtio_scsi_handle_cmd_req_prepare (Paolo     Bonzini) [Orabug: 39414097] {CVE-2026-5763}
    - softmmu: Support concurrent bounce buffers (Mattias Nissler) [Orabug: 37509310] {CVE-2024-8612}
    - system/physmem: Per-AddressSpace bounce buffering (Mattias Nissler) [Orabug: 37509310] {CVE-2024-8612}
    - system/physmem: Propagate AddressSpace to MapClient helpers (Mattias Nissler) [Orabug: 37509310]     {CVE-2024-8612}

Tenable has extracted the preceding description block directly from the Oracle Linux 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 Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:58571 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)

    Bug Fix(es) and Enhancement(s):

    * qemu-kvm hung during drain after double pause [rhel-10.2.z] (JIRA:RHEL-190702)

    * qemu-img create/convert fails on target block device with 4k sector size [rhel-10.2.z]     (JIRA:RHEL-207389)

    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 MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-1505:04 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 MiracleLinux 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 AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-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 AlmaLinux 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 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	Type	Severity
339383	AlmaLinux 10 : qemu-kvm (ALSA-2026:58571)	Nessus	Alma Linux Local Security Checks	Local	medium
339280	EulerOS Virtualization 2.13.0 : qemu (EulerOS-SA-2026-3245)	Nessus	Huawei Local Security Checks	Local	medium
339236	EulerOS Virtualization 2.13.1 : qemu (EulerOS-SA-2026-3205)	Nessus	Huawei Local Security Checks	Local	medium
339164	Oracle Linux 10 : qemu-kvm (ELSA-2026-58571)	Nessus	Oracle Linux Local Security Checks	Local	medium
339147	RockyLinux 10 : qemu-kvm (RLSA-2026:58571)	Nessus	Rocky Linux Local Security Checks	Local	medium
339119	Oracle Linux 9 : qemu-kvm (ELSA-2026-500220)	Nessus	Oracle Linux Local Security Checks	Local	high
339079	RHEL 10 : qemu-kvm (RHSA-2026:58571)	Nessus	Red Hat Local Security Checks	Local	medium
333607	MiracleLinux 9 : qemu-kvm-10.1.0-17.el9_8.4.ML.1 (AXSA:2026-1505:04)	Nessus	Miracle Linux Local Security Checks	Local	medium
331472	AlmaLinux 9 : qemu-kvm (ALSA-2026:39311)	Nessus	Alma Linux Local Security Checks	Local	medium
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	Local	high
327037	Oracle Linux 9 : qemu-kvm (ELSA-2026-39311)	Nessus	Oracle Linux Local Security Checks	Local	medium
326987	RockyLinux 9 : qemu-kvm (RLSA-2026:39311)	Nessus	Rocky Linux Local Security Checks	Local	medium
326984	RHEL 9 : qemu-kvm (RHSA-2026:39311)	Nessus	Red Hat Local Security Checks	Local	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	Local	high
325576	Amazon Linux 2 : qemu, --advisory ALAS2-2026-3793 (ALAS-2026-3793)	Nessus	Amazon Linux Local Security Checks	Local	medium
320830	Linux Distros Unpatched Vulnerability : CVE-2026-48914	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-48914

medium

Tenable Plugins

medium

medium

medium

medium

medium

high

medium

medium

medium

high

medium

medium

medium

high

medium

medium