{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-38323",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-38323"
  ],
  "published": "2025-07-10T08:18:24Z",
  "summary": "net: atm: add lec_mutex",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: atm: add lec_mutex\n\nsyzbot found its way in net/atm/lec.c, and found an error path\nin lecd_attach() could leave a dangling pointer in dev_lec[].\n\nAdd a mutex to protect dev_lecp[] uses from lecd_attach(),\nlec_vcc_attach() and lec_mcast_attach().\n\nFollowing patch will use this mutex for /proc/net/atm/lec.\n\nBUG: KASAN: slab-use-after-free in lecd_attach net/atm/lec.c:751 [inline]\nBUG: KASAN: slab-use-after-free in lane_ioctl+0x2224/0x23e0 net/atm/lec.c:1008\nRead of size 8 at addr ffff88807c7b8e68 by task syz.1.17/6142\n\nCPU: 1 UID: 0 PID: 6142 Comm: syz.1.17 Not tainted 6.16.0-rc1-syzkaller-00239-g08215f5486ec #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\nCall Trace:\n <TASK>\n  __dump_stack lib/dump_stack.c:94 [inline]\n  dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\n  print_address_description mm/kasan/report.c:408 [inline]\n  print_report+0xcd/0x680 mm/kasan/report.c:521\n  kasan_report+0xe0/0x110 mm/kasan/report.c:634\n  lecd_attach net/atm/lec.c:751 [inline]\n  lane_ioctl+0x2224/0x23e0 net/atm/lec.c:1008\n  do_vcc_ioctl+0x12c/0x930 net/atm/ioctl.c:159\n  sock_do_ioctl+0x118/0x280 net/socket.c:1190\n  sock_ioctl+0x227/0x6b0 net/socket.c:1311\n  vfs_ioctl fs/ioctl.c:51 [inline]\n  __do_sys_ioctl fs/ioctl.c:907 [inline]\n  __se_sys_ioctl fs/ioctl.c:893 [inline]\n  __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n  do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n </TASK>\n\nAllocated by task 6132:\n  kasan_save_stack+0x33/0x60 mm/kasan/common.c:47\n  kasan_save_track+0x14/0x30 mm/kasan/common.c:68\n  poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\n  __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394\n  kasan_kmalloc include/linux/kasan.h:260 [inline]\n  __do_kmalloc_node mm/slub.c:4328 [inline]\n  __kvmalloc_node_noprof+0x27b/0x620 mm/slub.c:5015\n  alloc_netdev_mqs+0xd2/0x1570 net/core/dev.c:11711\n  lecd_attach net/atm/lec.c:737 [inline]\n  lane_ioctl+0x17db/0x23e0 net/atm/lec.c:1008\n  do_vcc_ioctl+0x12c/0x930 net/atm/ioctl.c:159\n  sock_do_ioctl+0x118/0x280 net/socket.c:1190\n  sock_ioctl+0x227/0x6b0 net/socket.c:1311\n  vfs_ioctl fs/ioctl.c:51 [inline]\n  __do_sys_ioctl fs/ioctl.c:907 [inline]\n  __se_sys_ioctl fs/ioctl.c:893 [inline]\n  __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n  do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFreed by task 6132:\n  kasan_save_stack+0x33/0x60 mm/kasan/common.c:47\n  kasan_save_track+0x14/0x30 mm/kasan/common.c:68\n  kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576\n  poison_slab_object mm/kasan/common.c:247 [inline]\n  __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264\n  kasan_slab_free include/linux/kasan.h:233 [inline]\n  slab_free_hook mm/slub.c:2381 [inline]\n  slab_free mm/slub.c:4643 [inline]\n  kfree+0x2b4/0x4d0 mm/slub.c:4842\n  free_netdev+0x6c5/0x910 net/core/dev.c:11892\n  lecd_attach net/atm/lec.c:744 [inline]\n  lane_ioctl+0x1ce8/0x23e0 net/atm/lec.c:1008\n  do_vcc_ioctl+0x12c/0x930 net/atm/ioctl.c:159\n  sock_do_ioctl+0x118/0x280 net/socket.c:1190\n  sock_ioctl+0x227/0x6b0 net/socket.c:1311\n  vfs_ioctl fs/ioctl.c:51 [inline]\n  __do_sys_ioctl fs/ioctl.c:907 [inline]\n  __se_sys_ioctl fs/ioctl.c:893 [inline]\n  __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.142",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-38323"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e91274cc7ed88ab5bdc62d426067c82b0b118a0b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a7a713dfb5f9477345450f27c7c0741864511192"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/17e156a94e94a906a570dbf9b48877956c60bef8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/18e8f0c4f826fb08c2d3825cdd6c57e24b207e0a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dffd03422ae6a459039c8602f410e6c0f4cbc6c8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f4d80b16ecc4229f7e6345158ef34c36be323f0e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/64b378db28a967f7b271b055380c2360279aa424"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d13a3824bfd2b4774b671a75cf766a16637a0e67"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}