A flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. This issue requires the SPICE host to be untrusted or compromised for exploitation.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8723-1 advisory.

    It was discovered that SPICE vdagent had an integer overflow in the buffer size calculation used when     writing to the daemon socket. A malicious or compromised SPICE host could possibly use this issue to cause     SPICE vdagent to crash, resulting in a denial of service. (CVE-2026-57965)

    It was discovered that SPICE vdagent did not properly sanitize filenames provided by the SPICE host during     file transfers. A malicious or compromised SPICE host could possibly use this issue to write arbitrary     files to any location on the guest operating system with the privileges of the spice-vdagent process.
    (CVE-2026-57966)

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.

According to the versions of the spice-vdagent packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    A path traversal vulnerability was found in spice-vdagent. This flaw allows a malicious or compromised     SPICE host to write arbitrary files to any location on the guest operating system. This occurs because the     filename provided by the SPICE host during file transfers is not properly sanitized before being used. An     attacker could exploit this to write to sensitive locations with the privileges of the spice-vdagent     process, typically the logged-in user. This issue requires the SPICE host to be untrusted or compromised     for exploitation.(CVE-2026-57966)

    A flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow     by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the     spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. This     issue requires the SPICE host to be untrusted or compromised for exploitation.(CVE-2026-57965)

Tenable has extracted the preceding description block directly from the EulerOS spice-vdagent 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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104939 advisory.

    A flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow     by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the     spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. This     issue requires the SPICE host to be untrusted or compromised for exploitation.

Tenable has extracted the preceding description block directly from the Unity 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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-2061 advisory.

    A flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow     by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the     spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. This     issue requires the SPICE host to be untrusted or compromised for exploitation. (CVE-2026-57965)

    A path traversal vulnerability was found in spice-vdagent. This flaw allows a malicious or compromised     SPICE host to write arbitrary files to any location on the guest operating system. This occurs because the     filename provided by the SPICE host during file transfers is not properly sanitized before being used. An     attacker could exploit this to write to sensitive locations with the privileges of the spice-vdagent     process, typically the logged-in user. This issue requires the SPICE host to be untrusted or compromised     for exploitation. (CVE-2026-57966)

Tenable has extracted the preceding description block directly from the tested product 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 SLES12 / SLES_SAP12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3585-1 advisory.

    Security fixes:

    - CVE-2026-57965: integer overflow in `udscs_write()` can lead to heap buffer overflow (bsc#1269553).
    - CVE-2026-57966: improper sanitization allows a compromised SPICE host to write arbitrary files to any     location on the       guest operating system (bsc#1269554).

    Other fixes:

    - Fix startup issues with spice-vdagent.service (bsc#1189821)

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-2026:3470-1 advisory.

    - CVE-2026-57965: integer overflow in `udscs_write()` can lead to heap buffer overflow (bsc#1269553).
    - CVE-2026-57966: improper sanitization allows a compromised SPICE host to write arbitrary files to any     location on the       guest operating system (bsc#1269554).

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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3485-1 advisory.

    - CVE-2026-57965: integer overflow in `udscs_write()` can lead to heap buffer overflow (bsc#1269553).
    - CVE-2026-57966: improper sanitization allows a compromised SPICE host to write arbitrary files to any     location on the       guest operating system (bsc#1269554).

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 openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21506-1 advisory.

    - CVE-2026-57965: integer overflow in `udscs_write()` allows a compromised SPICE host to crash the `spice-     vdagent`       daemon via a specially crafted message that triggers a heap buffer overflow (bsc#1269553).
    - CVE-2026-57966: improper sanitization allows a compromised SPICE host to write arbitrary files to any     location on the       guest operating system (bsc#1269554).

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 Debian 11 / 12 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4698 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4698-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                          Abhijith PA     July 24, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : spice-vdagent     Version        : 0.20.0-2+deb11u1 0.22.1-3+deb12u1     CVE ID         : CVE-2026-57965 CVE-2026-57966     Debian Bug     : 1141317 1141318

    Two vulnerabilities were discovered in spice-vdagent, an agent program     under the SPICE project to ease the remote access to virtual machines     such as clipboard sharing, auto screen resizing.

    CVE-2026-57965

        A malicious or compromised SPICE host can trigger an integer         overflow by sending a specially crafted message. This         vulnerability can lead to a heap buffer overflow, causing the         spice-vdagent daemon to crash and resulting in a Denial of Service         (DoS) for the virtual machine.

    CVE-2026-57966

        A path traversal vulnerability was found in spice-vdagent. This         flaw allows a malicious or compromised SPICE host to write         arbitrary files to any location on the guest operating         system. This occurs because the filename provided by the SPICE         host during file transfers is not properly sanitized before being         used. An attacker could exploit this to write to sensitive         locations with the privileges of the spice-vdagent process,         typically the logged-in user.

    For Debian 11 bullseye, these problems have been fixed in version     0.20.0-2+deb11u1.

    For Debian 12 bookworm, these problems have been fixed in version     0.22.1-3+deb12u1.

    We recommend that you upgrade your spice-vdagent packages.

    For the detailed security status of spice-vdagent please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/spice-vdagent

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow     by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the     spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. This     issue requires the SPICE host to be untrusted or compromised for exploitation. (CVE-2026-57965)

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

ID	Name	Product	Family	Type	Severity
344620	Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS : SPICE vdagent vulnerabilities (USN-8723-1)	Nessus	Ubuntu Local Security Checks	Local	medium
343703	EulerOS 2.0 SP12 : spice-vdagent (EulerOS-SA-2026-3387)	Nessus	Huawei Local Security Checks	Local	medium
343612	EulerOS 2.0 SP12 : spice-vdagent (EulerOS-SA-2026-3312)	Nessus	Huawei Local Security Checks	Local	medium
341503	Unity Linux 20.1070e Security Update: spice-vdagent (UTSA-2026-104939)	Nessus	Unity Linux Local Security Checks	Local	medium
337215	Amazon Linux 2023 : spice-vdagent (ALAS2023-2026-2061)	Nessus	Amazon Linux Local Security Checks	Local	medium
335072	SUSE SLES12 Security Update : spice-vdagent (SUSE-SU-2026:3585-1)	Nessus	SuSE Local Security Checks	Local	medium
332124	SUSE SLES15 Security Update : spice-vdagent (SUSE-SU-2026:3470-1)	Nessus	SuSE Local Security Checks	Local	medium
332121	SUSE SLED15 / SLES15 Security Update : spice-vdagent (SUSE-SU-2026:3485-1)	Nessus	SuSE Local Security Checks	Local	medium
331665	openSUSE 16 Security Update : spice-vdagent (openSUSE-SU-2026:21506-1)	Nessus	SuSE Local Security Checks	Local	medium
329313	Debian dla-4698 : spice-vdagent - security update	Nessus	Debian Local Security Checks	Local	medium
323789	Linux Distros Unpatched Vulnerability : CVE-2026-57965	Nessus	Misc.	Local	medium

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