{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.4-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  libfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()  Since commit 1e7ab6f67824 (\"anon_inode: rework assertions\"), path_noexec() warns when an anonymous-inode file is mmap'd from a superblock that has not set SB_I_NOEXEC. dma-buf backs its files this way and never set the flag, so mmap of any exported buffer trips the warning on a CONFIG_DEBUG_VFS=y kernel:    WARNING: CPU: 11 PID: 121813 at fs/exec.c:118 path_noexec+0x47/0x50    do_mmap+0x2b5/0x680    vm_mmap_pgoff+0x129/0x210    ksys_mmap_pgoff+0x177/0x240    __x64_sys_mmap+0x33/0x70  init_pseudo() sets up internal SB_NOUSER mounts that are never path-reachable. Set both flags here so every pseudo filesystem gets them by default instead of each caller setting them.  SB_I_NODEV is inert for unreachable mounts. SB_I_NOEXEC has one visible effect: an executable mapping of a pseudo-fs fd, such as a dma-buf, now fails with -EPERM, which is the invariant the assertion enforces. No in-tree caller maps these executable.  Reproduce on CONFIG_DEBUG_VFS=y:    make -C tools/testing/selftests/dmabuf-heaps   sudo ./tools/testing/selftests/dmabuf-heaps/dmabuf-heap -t system",
  "id": "DEBIAN-CVE-2026-64596",
  "modified": "2026-09-14T16:47:41.384456894Z",
  "published": "2026-08-06T08:16:35.217Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64596"
    }
  ],
  "upstream": [
    "CVE-2026-64596"
  ]
}