A double-free vulnerability in vrend_renderer.c in virglrenderer through 0.8.1 allows attackers to cause a denial of service by triggering texture allocation failure, because vrend_renderer_resource_allocated_texture is not an appropriate place for a free.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-093023 advisory.

    A double-free vulnerability in vrend_renderer.c in virglrenderer through 0.8.1 allows attackers to cause a     denial of service by triggering texture allocation failure, because     vrend_renderer_resource_allocated_texture is not an appropriate place for a free.

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.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3232 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3232-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Tobias Frost     December 07, 2022                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : virglrenderer     Version        : 0.7.0-2+deb10u1     CVE ID         : CVE-2019-18388 CVE-2019-18389 CVE-2019-18390 CVE-2019-18391                      CVE-2020-8002 CVE-2020-8003 CVE-2022-0135     Debian Bug     : 946942 949954 1009073

    Several security vulnerabilities were discovered in virglrenderer, a virtual     GPU for KVM virtualization.

    CVE-2019-18388

        A NULL pointer dereference in vrend_renderer.c in virglrenderer through         0.8.0 allows guest OS users to cause a denial of service via malformed         commands.

    CVE-2019-18389

        A heap-based buffer overflow in the vrend_renderer_transfer_write_iov         function in vrend_renderer.c in virglrenderer through 0.8.0 allows         guest OS users to cause a denial of service, or QEMU guest-to-host         escape and code execution, via VIRGL_CCMD_RESOURCE_INLINE_WRITE         commands.

    CVE-2019-18390

        An out-of-bounds read in the vrend_blit_need_swizzle function in         vrend_renderer.c in virglrenderer through 0.8.0 allows guest OS         users to cause a denial of service via VIRGL_CCMD_BLIT commands.

    CVE-2019-18391

        A heap-based buffer overflow in the vrend_renderer_transfer_write_iov         function in vrend_renderer.c in virglrenderer through 0.8.0 allows         guest OS users to cause a denial of service via         VIRGL_CCMD_RESOURCE_INLINE_WRITE commands.

    CVE-2020-8002

        A NULL pointer dereference in vrend_renderer.c in virglrenderer through         0.8.1 allows attackers to cause a denial of service via commands that attempt         to launch a grid without previously providing a Compute Shader (CS).

    CVE-2020-8003

        A double-free vulnerability in vrend_renderer.c in virglrenderer through         0.8.1 allows attackers to cause a denial of service by triggering texture         allocation failure, because vrend_renderer_resource_allocated_texture is not an         appropriate place for a free.

    CVE-2022-0135

        An out-of-bounds write issue was found in the VirGL virtual OpenGL renderer         (virglrenderer). This flaw allows a malicious guest to create a specially         crafted virgil resource and then issue a VIRTGPU_EXECBUFFER ioctl, leading to a         denial of service or possible code execution.

    For Debian 10 buster, these problems have been fixed in version     0.7.0-2+deb10u1.

    We recommend that you upgrade your virglrenderer packages.

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

    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     Attachment:
    signature.asc     Description: PGP signature

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.

ID	Name	Product	Family	Type	Severity
341221	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: virglrenderer (UTSA-2026-093023)	Nessus	Unity Linux Local Security Checks	Local	medium
168487	Debian dla-3232 : libvirglrenderer-dev - security update	Nessus	Debian Local Security Checks	Local	high

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CVE-2020-8003

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