CVE-2026-43497 fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-after-free

In the Linux kernel, the following vulnerability has been resolved: fbdev: udlfb: add vmops to dlfbopsmmap to prevent use-after-free dlfbopsmmap uses remappfnrange to map vmalloc framebuffer pages to userspace but sets no vmops on the VMA. This means the kernel cannot track active mmaps. When...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the fbdev: udlfb module. In this module, the dlfbopsmmap function does not set vmops, causing the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: s390/vmem: Split pages when debug pagealloc is enabled. Since commit bb1520d581a3 “s390/mm: Start kernel with DAT enabled”, the kernel crashes early during boot when debug pagealloc is enabled. Symptoms: - Memory initialization:...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: ext4: Do not report a bug if someone dirty pages without first consulting ext4. The unpinuserpagesremote function dirty pages without properly warning the file system in advance. Jan Kara noted this race condition in 20181...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: powerpc/fixmap: Fixed the VM debug warning when unmapping a fixmap entry. The unmapping of a fixmap entry is performed by calling setfixmap, with FIXMAPPAGECLEAR as the flag. Currently, powerpc setfixmap calls mapkernelpage...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: BPF: Use VMMAP instead of VMALLOC for the ringbuf area. After the commit 2fd3fb0be1d1 “KASAN, vmalloc: Unpoison VMALLOC pages after mapping”, non-VMALLOC mappings will be marked as accessible in getvmareanode when KASAN is enable...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

A issue was discovered in include/asm-generic/tlb.h in the Linux kernel before version 5.19. Due to a race condition between unmapmappingrange and munmap, a device driver can free a page while it still has stale TLB entries. This only occurs in situations involving VMPFNMAP VMAs...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: xen/gntdev: Accommodation for VMA splitting Prior to this commit, the gntdev driver code did not handle the following scenario correctly with paravirtualized PV Xen domains: The user process sets up a gntdev mapping consisting of...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Fixed the mmap operation to include VMIO and VMDONTDUMP. In commit 510410bfc034 “drm/msm: Implement mmap as a GEM object function”, we switched to a new and cleaner approach for handling this issue. That’s good, but we...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/rmap: Fixed potential out-of-bounds access to the page table during batched unmap operations. As pointed out by David1, the batched unmap logic in trytounmapone may read past the end of a PTE table when the PTE mappings of a...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Added a synchronization step after creating a vram block. Data corruption will occur on vrams allocated by svm if the initialization is not complete and an application writes to the memory. Adding a synchronization st...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rustbinder: Avoid reading the written value in the offset array. When sending a transaction, its offset array is first copied into the target process’s virtual memory area vma. Then, the values are read back from there. This is...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/mseal: The end of the current VMA was correctly updated during merging. Previously, we stored the end of the current VMA in currend. When moving to the next VMA, we updated currstart to currend to proceed to the next VMA...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: drm/amdgpu: Further fixes were made to the call order in amdgputtmmove v2. This resolves the issue in drm/amdgpu: fixing the ftrace event where amdgpuboMove always moves objects on the same heap. The fundamental problem is tha...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: Avoid corrupting the page-mapping in hugetlbmcopyatomicpte. In the MCOPYATOMICCONTINUE case with a non-shared VMA, the pages in the page cache are stored in the ptes. However, hugepageaddnewanonrmap is called for thes...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fixed an stale locked mutex in nouveaugemioctlpushbuf If VMBIND is enabled on the client, the legacy submission ioctl cannot be used. However, if a client attempts to use it anyway, an error will be returned. In this...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rustbinder: Check ownership before using vma. When installing missing pages or zapping them, Rust Binder will look up the vma in the memory management unit by address, and then call vminsertpage or zappagerangesingle. However, if...

Astra Linux – Vulnerability in Linux

A issue was discovered in Linux: improper handling of VMIO|VMPFNMAP vmas in KVM can bypass RO checks and may cause pages to be freed while still accessible by the VMM and guest. This allows users who have the ability to start and control a VM to read/write random pages of memory, potentially...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Fix bootup splat with separategpudrm modparam The drmgemforeachgpuvmbo call from lookupvma accesses drmgemobj.gpuva.list, which is not initialized when the drm driver does not support DRIVERGEMGPUVA feature. Enable it fo...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksm: The range-walk function is used to skip over unmapped regions during the scangetnextrmapitem operation. Currently, scangetnextrmapitem traverses every page address in a VMA to locate mergeable pages. This approach becomes...