title: Mali GPU Kernel Driver allows improper GPU memory processing operations
description: Use After Free vulnerability in Arm Ltd Midgard GPU Kernel Driver, Arm Ltd Bifrost GPU Kernel Driver, Arm Ltd Valhall GPU Kernel Driver, Arm Ltd Arm 5th Gen GPU Architecture Kernel Driver allows a local non-privileged user to exploit a software race condition to perform improper memory processing operations. If the system’s memory is carefully prepared by the user and the system is under heavy load, then this in turn cause a use-after-free.This issue affects Midgard GPU Kernel Driver: from r13p0 through r32p0; Bifrost GPU Kernel Driver: from r1p0 through r18p0; Valhall GPU Kernel Driver: from r37p0 through r46p0; Arm 5th Gen GPU Architecture Kernel Driver: from r41p0 through r46p0.
problem types: CWE-416 Use After Free
affected:
{
defaultStatus: unaffected
product: Midgard GPU Kernel Driver
vendor: Arm Ltd
versions:
lessThanOrEqual: r32p0, status: affected, version: r13p0, versionType: patch
}
{
defaultStatus: unaffected
product: Bifrost GPU Kernel Driver
vendor: Arm Ltd
versions:
changes: [at: r19p0, status: unaffected], lessThanOrEqual: r18p0, status: affected, version: r1p0, versionType: patch
}
{
defaultStatus: unaffected
product: Valhall GPU Kernel Driver
vendor: Arm Ltd
versions:
changes: [at: r47p0, status: unaffected], lessThanOrEqual: r46p0, status: affected, version: r37p0, versionType: patch
}
{
defaultStatus: unaffected
product: Arm 5th Gen GPU Architecture Kernel Driver
vendor: Arm Ltd
versions:
changes: [at: r47p0, status: unaffected], lessThanOrEqual: r46p0, status: affected, version: r41p0, versionType: patch
}
solutions: This issue is fixed in the Bifrost Kernel Driver in r19p0, in the Valhall and Arm 5th Gen GPU Architecture Kernel Drivers in r47p0. Users are recommended to upgrade if they are impacted by this issue. Please contact Arm support for Midgard GPUs.