Ubuntu 20.04 LTS : Linux kernel (GCP) vulnerabilities (USN-8297-1)

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8297-1 advisory. Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission chec...

kernel: RDMA/umem: Fix double dma_buf_unpin in failure path

A flaw was found in the Linux kernel's RDMA/umem subsystem. A memory management error, specifically a double unpin of a dmabuf, can occur in a failure path during dmabuf pinning operations. This vulnerability could lead to system instability or a crash, resulting in a Denial of Service DoS...

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 in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: drm/msm: Fixed GEM free for imported dma-bufs Imported dma-bufs also have obj-resv != &obj-resv. Therefore, we should check this condition in addition to checking flags for handling the NOSHARE case. Fixed the issue reported...

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 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/xe/sync: Fixed the memory leak caused by improper release of the user fence when dmafencechainalloc fails. When dmafencechainalloc fails, it is necessary to properly release the reference to the user fence to prevent a memory...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: accel/qaic: The integer overflow checks in mapuserpages have been cleaned up. The encodedma function includes some validations for intrans-size. However, it would be clearer to move these checks to findandmapuserpages. encoded...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: net: lan966x: Fixed issues related to use-after-free and leaks in lan966xfdmareload. When lan966xfdmareload fails to allocate new RX buffers, the restore path restarts DMA using old descriptors whose pages have already been...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio: Packed data – fix an unmap leak for the indirect desc table When usedmaapi and premapped are set to true, the dounmap operation is not executed. As a result, the vringunmapextrapacked function is not called by...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: powerpc/rtas: Use the correct function name for resetting TCE tables. The PAPR specification specifies that the function name should be written as “ibm,reset-pe-dma-windows”. However, in practice, the firmware uses the singula...

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 Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: “Revert ‘drm/prime: Use dmabuf from GEM object instance’” This reversion is achieved through the commit f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8. The dmabuf field in the struct drmgemobject is not stable throughout the lifetime o...

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

In the Linux kernel, the following vulnerabilities have been resolved: i3c: mipi-i3c-hci: Correct handling of RINGCTRLABORT in DMA dequeue. The logic used to abort the DMA ring contains several flaws: 1. The driver issues an abort unconditionally, even when the ring has already stopped. 2. The...

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

In the Linux kernel, the following vulnerabilities have been resolved: gve: Corrected incorrect buffer cleanup in gvetxcleanpendingpackets for QPL. In DQ-QPL mode, gvetxcleanpendingpackets incorrectly uses the RDA buffer cleanup path. It iterates a certain number of times and attempts to unmap...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: iouring/zcrx: fixed the sgtable leak that occurs during mapping failures. In a rare case where iopopulateareadma fails—which can only occur on a PAGEPOOL32BITARCHWITH64BITDMA machine—iozcrxmaparea will have an initialized but...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: media: iris: Add the buffer to the list only after a successful allocation. We moved the listaddtail function to after dmaalloc attrs succeeds when creating internal buffers. Previously, the buffer was enqueued into the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: mana: Fixed the Rx DMA data size and skboverpanic issue. The function managetrxbufcfg aligns the DMA data size of the RX buffer to be a multiple of 64. As a result, a packet slightly larger than mtu+14, for example, 1536...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net: atlantic: Fixed the DMA mapping for PTP HWTS rings. The function aqringhwtsrxalloc maps additional AQCFGRXDSDEF bytes for PTP HWTS rings. However, the generic aqringfree function does not take this into account. To fix th...