Matthewshao

**Name of the Vulnerable Software and Affected Versions** virglrenderer versions 0.8.0 and earlier **Description** The issue is related to an out-of-bounds read in the `vrend blit need swizzle` function in `vrend renderer.c` in virglrenderer. This can be exploited by guest OS users to cause a denial of service via `VIRGL CCMD BLIT` commands. **Recommendations** For versions 0.8.0 and earlier, consider disabling the `vrend blit need swizzle` function as a temporary workaround to prevent exploitation via `VIRGL CCMD BLIT` commands until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** virglrenderer versions prior to 0.8.0 **Description** A heap-based buffer overflow issue in the `vrend renderer transfer write iov` function allows guest OS users to cause a denial of service via `VIRGL CCMD RESOURCE INLINE WRITE` commands. This issue is related to a buffer overflow in memory, which can be exploited to disrupt service. **Recommendations** For versions prior to 0.8.0, update to a version 0.8.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of the `vrend renderer transfer write iov` function until a patch is available. Avoid using the `VIRGL CCMD RESOURCE INLINE WRITE` commands in the affected API endpoint until the issue is resolved.

**Name of the Vulnerable Software and Affected Versions** Virglrenderer versions through 0.8.0 **Description** The issue is related to a NULL pointer dereference in the `vrend renderer.c` component of the virtual OpenGL renderer. This can be exploited by guest OS users to cause a denial of service via malformed commands. The vulnerability is associated with pointer dereference errors, which can allow an attacker to disrupt service. **Recommendations** For versions through 0.8.0, update to a version later than 0.8.0 to resolve the issue. At the moment, there is no information about other specific fixes for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Virglrenderer versions through 0.8.0 **Description** A heap-based buffer overflow issue in the `vrend renderer transfer write iov` function allows guest OS users to cause a denial of service or achieve QEMU guest-to-host escape and code execution via `VIRGL CCMD RESOURCE INLINE WRITE` commands. This can potentially lead to unauthorized access to confidential data, disruption of data integrity, and service disruption. **Recommendations** For versions through 0.8.0, update to a version later than 0.8.0 to resolve the issue. As a temporary workaround, consider restricting the use of the `vrend renderer transfer write iov` function until a patch is available. Avoid using `VIRGL CCMD RESOURCE INLINE WRITE` commands in the affected API endpoint until the issue is resolved.