A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter length than expected, leading to an out-of-bounds write. Successful exploitation could result in unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing information disclosure, data integrity issues, or a denial of service.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to
    write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter
    length than expected, leading to an out-of-bounds write. Successful exploitation could result in
    unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing
    information disclosure, data integrity issues, or a denial of service. (CVE-2026-3842)

According to the versions of the qemu packages installed, the EulerOS 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)

    NA(CVE-2026-3886)

    A flaw was found in the virtio-crypto device of QEMU. A malicious guest operating system can exploit a     missing length limit in the AKCIPHER path, leading to uncontrolled memory allocation. This can result in a     denial of service (DoS) on the host system by causing the QEMU process to terminate     unexpectedly.(CVE-2025-14876)

    An off-by-one error was found in QEMU's KVM Xen guest support. A malicious guest could use this flaw to     trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface,     leading to a denial of service or potential memory corruption.(CVE-2026-0665)

    A stack-based buffer overflow was found in the QEMU e1000 network device. The code for padding short     frames was dropped from individual network devices and moved to the net core code. The issue stems from     the device's receive code still being able to process a short frame in loopback mode. This could lead to a     buffer overrun in the e1000_receive_iov() function via the loopback code path. A malicious guest user     could use this vulnerability to crash the QEMU process on the host, resulting in a denial of     service.(CVE-2025-12464)

    A flaw was found in QEMU. If the QIOChannelWebsock object is freed while it is waiting to complete a     handshake, a GSource is leaked. This can lead to the callback firing later on and triggering a use-after-     free in the use of the channel. This can be abused by a malicious client with network access to the VNC     WebSocket port to cause a denial of service during the WebSocket handshake prior to the VNC client     authentication.(CVE-2025-11234)

    A flaw was found in QEMU. A specially crafted VMDK image could trigger an out-of-bounds read     vulnerability, potentially leading to a 12-byte leak of sensitive information or a denial of service     condition (DoS).(CVE-2026-2243)

    A flaw was found in the QEMU Virtio PCI Bindings (hw/virtio/virtio-pci.c). An improper release and use of     the irqfd for vector 0 during the boot process leads to a guest triggerable crash via vhost_net_stop().
    This flaw allows a malicious guest to crash the QEMU process on the host.(CVE-2024-4693)

    A use-after-free vulnerability was found in the QEMU LSI53C895A SCSI Host Bus Adapter emulation. This     issue can lead to a crash or VM escape.(CVE-2024-6519)

    A vulnerability was found in QEMU (Virtualization Software) (the affected version unknown). It has been     declared as critical.The CWE definition for the vulnerability is CWE-787. The product writes data past the     end, or before the beginning, of the intended buffer.As an impact it is known to affect confidentiality,     integrity, and availability.Applying the patch 4f28b87fdd24df2049626106b7c24d0180952115 is able to     eliminate this problem. The bugfix is ready for download at gitlab.com.(CVE-2026-3842)

    A flaw was found in QEMU. An assertion failure was present in the usb_ep_get() function in hw/net/core.c     when trying to get the USB endpoint from a USB device. This flaw may allow a malicious unprivileged guest     user to crash the QEMU process on the host and cause a denial of service condition.(CVE-2024-8354)

    An integer overflow vulnerability was found in the virtio-snd device via PCM_INFO requests from the guest.
    A malicious guest can provide out-of-bounds stream counts, potentially leading to unbounded memory     allocation on the host and a denial of service condition.(CVE-2026-3196)

    A flaw was found in QEMU. When reading input audio in the virtio-snd device input callback, the     `virtio_snd_pcm_in_cb` function did not check whether the iov could fit the data buffer, potentially     leading to a heap out-of-bounds write. This issue exists due to an incomplete fix for     CVE-2024-7730.(CVE-2026-3195)

Tenable has extracted the preceding description block directly from the EulerOS qemu 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2385-1 advisory.

    - CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak     when processing       specially crafted VMDK files (bsc#1258509).
    - CVE-2026-3195: heap buffer overflow when reading input audio in the virtio-snd device input callback due     to       insufficient checks in `virtio_snd_pcm_in_cb` (bsc#1259080).
    - CVE-2026-3196: integer overflow in the virtio-snd device via PCM_INFO requests from the guest leads to     unbounded       memory allocation and host denial-of-service (bsc#1259079).
    - CVE-2026-3842: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host OOB     write       (bsc#1262089).

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 SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2388-1 advisory.

    Security fixes:

    - CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak     when processing       specially crafted VMDK files (bsc#1258509).
    - CVE-2026-3842: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host OOB     write       (bsc#1262089).

    Other fixes:

    - [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 remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2386-1 advisory.

    - CVE-2025-14876: qemu-kvm: Unbounded allocation in virtio-crypto (bsc#1255400).
    - CVE-2026-0665: out-of-bounds heap access can lead to a denial of service or potential memory corruption     (bsc#1256484).
    - CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak     when processing       specially crafted VMDK files (bsc#1258509).
    - CVE-2026-3195: heap buffer overflow when reading input audio in the virtio-snd device input callback due     to       insufficient checks in `virtio_snd_pcm_in_cb` (bsc#1259080).
    - CVE-2026-3196: integer overflow in the virtio-snd device via PCM_INFO requests from the guest leads to     unbounded       memory allocation and host denial-of-service (bsc#1259079).
    - CVE-2026-3842: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host OOB     write       (bsc#1262089).

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 Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8161-1 advisory.

    It was discovered that the LSI53C895A SCSI Host Bus Adapter implementation of QEMU incorrectly handled     memory. An attacker inside the guest could possibly use this issue to cause QEMU to crash, resulting in a     denial of service, or possibly execute arbitrary code. (CVE-2024-6519)

    It was discovered that QEMU could be made to read out of bounds when reading VMDK images. If a user or an     automated system were tricked into opening a specially crafted VMDK image, an attacker could possibly use     this issue to leak sensitive informaton or cause QEMU to crash, resulting in a denial of service.
    (CVE-2026-2243)

    It was discovered that the virtio-snd device implementation of QEMU could be made to write out of bounds.
    An attacker inside the guest could possibly use this issue to cause QEMU to crash, resulting in a denial     of service, or possibly execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu     25.10. (CVE-2026-3195)

    It was discovered that the virtio-snd device implementation of QEMU contained an arithmetic overflow. An     attacker inside the guest could possibly use this issue to cause QEMU to crash, resulting in a denial of     service, or possibly execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10.
    (CVE-2026-3196)

    It was discovered that the Hyper-V Synthetic Debugging device implementation of QEMU could me made to     write out of bounds. An attacker inside the guest could possibly use this issue to cause QEMU to crash,     resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu     24.04 LTS and Ubuntu 25.10. (CVE-2026-3842)

Tenable has extracted the preceding description block directly from the Ubuntu 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 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. This vulnerability allows a local attacker within a guest virtual machine to     write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter     length than expected, leading to an out-of-bounds write. Successful exploitation could result in     unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing     information disclosure, data integrity issues, or a denial of service. (CVE-2026-3842)

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

ID	Name	Product	Family	Type	Severity
462553	Echo: qemu: security update to 1:10.0.8+ds-0+deb13u1+e2	Tenable Cloud Security	Echo Local Security Checks	Local	high
462553	Echo: qemu: security update to 1:10.0.8+ds-0+deb13u1+e2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
346769	EulerOS 2.0 SP15 : qemu (EulerOS-SA-2026-3820)	Nessus	Huawei Local Security Checks	Local	medium
346751	EulerOS 2.0 SP15 : qemu (EulerOS-SA-2026-3795)	Nessus	Huawei Local Security Checks	Local	medium
321048	SUSE SLED15 / SLES15 Security Update : qemu (SUSE-SU-2026:2385-1)	Nessus	SuSE Local Security Checks	Local	high
321039	SUSE SLES15 Security Update : qemu (SUSE-SU-2026:2388-1)	Nessus	SuSE Local Security Checks	Local	medium
321014	SUSE SLES15 Security Update : qemu (SUSE-SU-2026:2386-1)	Nessus	SuSE Local Security Checks	Local	high
306091	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : QEMU vulnerabilities (USN-8161-1)	Nessus	Ubuntu Local Security Checks	Local	high
303111	Linux Distros Unpatched Vulnerability : CVE-2026-3842	Nessus	Misc.	Local	high

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