{
  "id": "CVE-2024-39497",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-07-12T13:15:12.320",
  "lastModified": "2024-07-12T13:15:12.320",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE)\n\nLack of check for copy-on-write (COW) mapping in drm_gem_shmem_mmap\nallows users to call mmap with PROT_WRITE and MAP_PRIVATE flag\ncausing a kernel panic due to BUG_ON in vmf_insert_pfn_prot:\nBUG_ON((vma->vm_flags & VM_PFNMAP) && is_cow_mapping(vma->vm_flags));\n\nReturn -EINVAL early if COW mapping is detected.\n\nThis bug affects all drm drivers using default shmem helpers.\nIt can be reproduced by this simple example:\nvoid *ptr = mmap(0, size, PROT_WRITE, MAP_PRIVATE, fd, mmap_offset);\nptr[0] = 0;"
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}