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A flaw was found in the VirGL virtual OpenGL renderer (virglrenderer). The virgl did not properly initialize memory when allocating a host-backed memory resource. A malicious guest could use this flaw to mmap from the guest kernel and read this uninitialized memory from the host, possibly leading to information disclosure.
An out-of-bound write was found in virglrenderer in src/vrendrenderer.c:readtransferdata().
A double-free vulnerability in vrendrenderer.c in virglrenderer through 0.8.1 allows attackers to cause a denial of service by triggering texture allocation failure, because vrendrendererresourceallocatedtexture is not an appropriate place for a free.
A NULL pointer dereference in vrendrenderer.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).
A heap-based buffer overflow in the vrendrenderertransferwriteiov function in vrendrenderer.c in virglrenderer through 0.8.0 allows guest OS users to cause a denial of service via VIRGLCCMDRESOURCEINLINEWRITE commands.
An out-of-bounds read in the vrendblitneedswizzle function in vrendrenderer.c in virglrenderer through 0.8.0 allows guest OS users to cause a denial of service via VIRGLCCMDBLIT commands.
A NULL pointer dereference in vrendrenderer.c in virglrenderer through 0.8.0 allows guest OS users to cause a denial of service via malformed commands.
A heap-based buffer overflow in the vrendrenderertransferwriteiov function in vrendrenderer.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 VIRGLCCMDRESOURCEINLINEWRITE commands.
The vrenddrawvbo function in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors involving vertextbufferindex.
Memory leak in the virglresourceattachbacking function in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (memory consumption) via a large number of VIRTIOGPUCMDRESOURCEATTACHBACKING commands.
The parseinstruction function in gallium/auxiliary/tgsi/tgsitext.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (out-of-bounds array access and process crash) via a crafted texture instruction.
Memory leak in the vrendrenderercontextcreateinternal function in vrenddecode.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (host memory consumption) by repeatedly creating a decode context.
Memory leak in the vrendcreatevertexelementsstate function in vrendrenderer.c in virglrenderer allows local guest OS users to cause a denial of service (host memory consumption) via a large number of VIRGLOBJECTVERTEXELEMENTS commands.
Memory leak in the addshaderprogram function in vrendrenderer.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (host memory consumption) via vectors involving the sprog variable.
The vrenddecodereset function in vrenddecode.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (NULL pointer dereference and QEMU process crash) by destroying context 0 (zero).
Stack-based buffer overflow in the parseidentifier function in tgsitext.c in the TGSI auxiliary module in the Gallium driver in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related to parsing properties.
Heap-based buffer overflow in the vrendcreatevertexelementsstate function in vrendrenderer.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (out-of-bounds array access and crash) via the numelements parameter.
Memory leak in the vrendrendererinitblitctx function in vrendblitter.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (host memory consumption) via a large number of VIRGLCCMDBLIT commands.
Stack-based buffer overflow in the vrenddecodesetframebufferstate function in vrenddecode.c in virglrenderer before 926b9b3460a48f6454d8bbe9e44313d86a65447f, as used in Quick Emulator (QEMU), allows a local guest users to cause a denial of service (application crash) via the "nrcbufs" argument.
The utilformatispureuint function in vrendrenderer.c in Virgil 3d project (aka virglrenderer) 0.6.0 and earlier allows local guest OS users to cause a denial of service (NULL pointer dereference) via a crafted VIRGLCCMDCLEAR command.