Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Install a stub fence into potential unused fence pointers. When using cpu to update page tables, VM update fences are unused. Instead, install a stub fence into these fence pointers, rather than setting them to NULL...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: vfio/type1: prevents underflow of lockedvm via exec When a vfio container is preserved during execution, the task does not change. Instead, a new memory page is allocated with lockedvm=0, and the counter from existing DMA mapping...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: “Revert ‘drm/gem-dma: Use dmabuf from GEM object instance’” This change is reflected in commit e8afa1557f4f963c9a511bd2c6074a941c308685. The dmabuf field in the struct drmgemobject is not stable throughout the lifetime of the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: wl1251: Dynamic allocation of memory used for DMA. With the introduction of vmap-ed stacks, stack parameters can no longer be used for DMA, which can now lead to kernel panic. This issue occurs in several locations related to...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: iavf: Fixed error handling related to adminq. iavfallocasqbufs/iavfallocarqbufs allocate memory for VF mailbox using dmaalloccoherent. DMA regions for both ASQ and ARQ are freed in case an error occurs during the configuration...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: dmaengine: ptdma: A check for a null descriptor is performed before calling ptcmdcallback. This issue resolves a panic that can occur on AMD systems, typically during host shutdown, after the PTDMA driver has been exercised. The...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: serial: amba-pl011: avoid SBSA UART accessing the DMACR register The chapter “B Generic UART” in “ARM Server Base System Architecture” 1 describes a generic UART interface. Such a generic UART does not support DMA. In current cod...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: Misc: pciendpointtest: Fixed the panic that occurs when calling pciendpointtestcopy,write,read The dmamapsingle function does not allow zero-length mappings. This can cause a panic. A panic was reported on the arm64...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ALSA: pcm: Added a sanity NULL check for the default mmap fault handler. A driver may allow access to mmap before properly initializing runtime-dmaarea. A proper NULL check should be added before passing the value to virttopag...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: Fixed the issue where the dmabuf was not unpinned in the error-prone preparefb function. Corrected the error handling in preparefb to prevent resource leaks when an error occurs...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/pagewalk: fixed a race condition between concurrent operations involving splitting PUD entries and refaulting PUD leaf entries. The splitting of a PUD entry in walkpudrange can cause a race with a concurrent thread that refaul...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: atmel: The issue with reference counting was fixed in atmelnandcontrollerinit. The reference counting issue occurs in several error handling paths involving an object with a refcount, called “nc-dmac”. In these path...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: swiotlb: Fixed the issue of double-allocation of slots due to incorrect alignment handling. The commit bbb73a103fbb “swiotlb: fix a braino in the alignment check fix” addressed the issue in commit 0eee5ae10256 “swiotlb: fix sl...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: dma-buf: Fixed NULL pointer dereferencing in sanitycheck. If mockchain returns NULL due to a memory allocation failure, it is passed to dmafenceenableswsignaling, resulting in a NULL pointer dereferencing there. Call...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: dma-debug: Do not call dmaentryalloccheckleak under freeentrieslock. dmaentryalloccheckleak calls into printk, which outputs to the serial console qcom geni. It also acquires port-lock under freeentrieslock. This involves a rever...

Astra Linux – Vulnerability in Qemu

QEMU prior to version 8.2.0 has an integer underflow issue, which can lead to a buffer overflow. This occurs due to a TI command, where a transfer length that is not a DMA transfer is processed, even though that length is shorter than the length of the available FIFO data. This issue arises in th...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: avoid double fput on failed usercopy If the copy back to userland fails for the FASTRPCIOCTLALLOCDMABUFF ioctl, we should not assume that ‘buf-dmabuf’ is still valid. In fact, dmabuffd calls fdinstall before, there...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: dmaengine: Fixed an issue where the clientcount variable was incremented twice for public channels when dmachanget was called for a channel. This occurred first in balancerefcount, and again before returning. As a result, the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: “Revert ‘drm/gem-framebuffer: Use dmabuf from GEM object instance’” This reversion is covered in the commit cce16fcd7446dcff7480cd9d2b6417075ed81065. The dmabuf field in the struct drmgemobject is not stable throughout the lifeti...

Astra Linux – Vulnerability in Qemu

A reentrancy issue related to DMA was discovered in the Tulip device emulation in QEMU. When Tulip reads from or writes to the rx/tx descriptor, or copies a rx/tx frame, it does not check whether the destination address is its own MMIO address. This can cause the device to trigger MMIO handlers...