CVE-2025-38051 (GCVE-0-2025-38051)
Vulnerability from cvelistv5
Published
2025-06-18 09:33
Modified
2025-06-18 09:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_fill_dirent There is a race condition in the readdir concurrency process, which may access the rsp buffer after it has been released, triggering the following KASAN warning. ================================================================== BUG: KASAN: slab-use-after-free in cifs_fill_dirent+0xb03/0xb60 [cifs] Read of size 4 at addr ffff8880099b819c by task a.out/342975 CPU: 2 UID: 0 PID: 342975 Comm: a.out Not tainted 6.15.0-rc6+ #240 PREEMPT(full) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x53/0x70 print_report+0xce/0x640 kasan_report+0xb8/0xf0 cifs_fill_dirent+0xb03/0xb60 [cifs] cifs_readdir+0x12cb/0x3190 [cifs] iterate_dir+0x1a1/0x520 __x64_sys_getdents+0x134/0x220 do_syscall_64+0x4b/0x110 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f996f64b9f9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0d f7 c3 0c 00 f7 d8 64 89 8 RSP: 002b:00007f996f53de78 EFLAGS: 00000207 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f996f53ecdc RCX: 00007f996f64b9f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f996f53dea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000207 R12: ffffffffffffff88 R13: 0000000000000000 R14: 00007ffc8cd9a500 R15: 00007f996f51e000 </TASK> Allocated by task 408: kasan_save_stack+0x20/0x40 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x6e/0x70 kmem_cache_alloc_noprof+0x117/0x3d0 mempool_alloc_noprof+0xf2/0x2c0 cifs_buf_get+0x36/0x80 [cifs] allocate_buffers+0x1d2/0x330 [cifs] cifs_demultiplex_thread+0x22b/0x2690 [cifs] kthread+0x394/0x720 ret_from_fork+0x34/0x70 ret_from_fork_asm+0x1a/0x30 Freed by task 342979: kasan_save_stack+0x20/0x40 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 __kasan_slab_free+0x37/0x50 kmem_cache_free+0x2b8/0x500 cifs_buf_release+0x3c/0x70 [cifs] cifs_readdir+0x1c97/0x3190 [cifs] iterate_dir+0x1a1/0x520 __x64_sys_getdents64+0x134/0x220 do_syscall_64+0x4b/0x110 entry_SYSCALL_64_after_hwframe+0x76/0x7e The buggy address belongs to the object at ffff8880099b8000 which belongs to the cache cifs_request of size 16588 The buggy address is located 412 bytes inside of freed 16588-byte region [ffff8880099b8000, ffff8880099bc0cc) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99b8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000 head: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001 head: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000 head: 0080000000000003 ffffea0000266e01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880099b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880099b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880099b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880099b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880099b8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== POC is available in the link [1]. The problem triggering process is as follows: Process 1 Process 2 ----------------------------------- ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b197931fbc821bc7e9e91bf619400db563e3338
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73cadde98f67f76c5eba00ac0b72c453383cec8b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9bea368648ac46f8593a780760362e40291d22a9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9c9aafbacc183598f064902365e107b5e856531f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a24c2f05ac3c5b0aaa539d9d913826d2643dfd0e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7a8fe56e932a36f43e031b398aef92341bf5ea0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aee067e88d61eb72e966f094e4749c6b14e7008f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c8623231e0edfcccb7cc6add0288fa0f0594282f
Impacted products
Vendor Product Version
Linux Linux Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: a364bc0b37f14ffd66c1f982af42990a9d77fa43
Version: 0f3da51e7046e2eb28992ba65c22d058f571356c
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   Linux Linux Version: 2.6.28
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix use-after-free in cifs_fill_dirent\n\nThere is a race condition in the readdir concurrency process, which may\naccess the rsp buffer after it has been released, triggering the\nfollowing KASAN warning.\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in cifs_fill_dirent+0xb03/0xb60 [cifs]\n Read of size 4 at addr ffff8880099b819c by task a.out/342975\n\n CPU: 2 UID: 0 PID: 342975 Comm: a.out Not tainted 6.15.0-rc6+ #240 PREEMPT(full)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x53/0x70\n  print_report+0xce/0x640\n  kasan_report+0xb8/0xf0\n  cifs_fill_dirent+0xb03/0xb60 [cifs]\n  cifs_readdir+0x12cb/0x3190 [cifs]\n  iterate_dir+0x1a1/0x520\n  __x64_sys_getdents+0x134/0x220\n  do_syscall_64+0x4b/0x110\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n RIP: 0033:0x7f996f64b9f9\n Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89\n f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01\n f0 ff ff  0d f7 c3 0c 00 f7 d8 64 89 8\n RSP: 002b:00007f996f53de78 EFLAGS: 00000207 ORIG_RAX: 000000000000004e\n RAX: ffffffffffffffda RBX: 00007f996f53ecdc RCX: 00007f996f64b9f9\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n RBP: 00007f996f53dea0 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000207 R12: ffffffffffffff88\n R13: 0000000000000000 R14: 00007ffc8cd9a500 R15: 00007f996f51e000\n  \u003c/TASK\u003e\n\n Allocated by task 408:\n  kasan_save_stack+0x20/0x40\n  kasan_save_track+0x14/0x30\n  __kasan_slab_alloc+0x6e/0x70\n  kmem_cache_alloc_noprof+0x117/0x3d0\n  mempool_alloc_noprof+0xf2/0x2c0\n  cifs_buf_get+0x36/0x80 [cifs]\n  allocate_buffers+0x1d2/0x330 [cifs]\n  cifs_demultiplex_thread+0x22b/0x2690 [cifs]\n  kthread+0x394/0x720\n  ret_from_fork+0x34/0x70\n  ret_from_fork_asm+0x1a/0x30\n\n Freed by task 342979:\n  kasan_save_stack+0x20/0x40\n  kasan_save_track+0x14/0x30\n  kasan_save_free_info+0x3b/0x60\n  __kasan_slab_free+0x37/0x50\n  kmem_cache_free+0x2b8/0x500\n  cifs_buf_release+0x3c/0x70 [cifs]\n  cifs_readdir+0x1c97/0x3190 [cifs]\n  iterate_dir+0x1a1/0x520\n  __x64_sys_getdents64+0x134/0x220\n  do_syscall_64+0x4b/0x110\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n The buggy address belongs to the object at ffff8880099b8000\n  which belongs to the cache cifs_request of size 16588\n The buggy address is located 412 bytes inside of\n  freed 16588-byte region [ffff8880099b8000, ffff8880099bc0cc)\n\n The buggy address belongs to the physical page:\n page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99b8\n head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n anon flags: 0x80000000000040(head|node=0|zone=1)\n page_type: f5(slab)\n raw: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001\n raw: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000\n head: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001\n head: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000\n head: 0080000000000003 ffffea0000266e01 00000000ffffffff 00000000ffffffff\n head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n  ffff8880099b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n  ffff8880099b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n \u003effff8880099b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                             ^\n  ffff8880099b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n  ffff8880099b8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ==================================================================\n\nPOC is available in the link [1].\n\nThe problem triggering process is as follows:\n\nProcess 1                       Process 2\n-----------------------------------\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T09:33:32.805Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aee067e88d61eb72e966f094e4749c6b14e7008f"
        },
        {
          "url": "https://git.kernel.org/stable/c/a24c2f05ac3c5b0aaa539d9d913826d2643dfd0e"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b197931fbc821bc7e9e91bf619400db563e3338"
        },
        {
          "url": "https://git.kernel.org/stable/c/c8623231e0edfcccb7cc6add0288fa0f0594282f"
        },
        {
          "url": "https://git.kernel.org/stable/c/73cadde98f67f76c5eba00ac0b72c453383cec8b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9bea368648ac46f8593a780760362e40291d22a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c9aafbacc183598f064902365e107b5e856531f"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7a8fe56e932a36f43e031b398aef92341bf5ea0"
        }
      ],
      "title": "smb: client: Fix use-after-free in cifs_fill_dirent",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38051",
    "datePublished": "2025-06-18T09:33:32.805Z",
    "dateReserved": "2025-04-16T04:51:23.979Z",
    "dateUpdated": "2025-06-18T09:33:32.805Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38051\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T10:15:37.693\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: Fix use-after-free in cifs_fill_dirent\\n\\nThere is a race condition in the readdir concurrency process, which may\\naccess the rsp buffer after it has been released, triggering the\\nfollowing KASAN warning.\\n\\n ==================================================================\\n BUG: KASAN: slab-use-after-free in cifs_fill_dirent+0xb03/0xb60 [cifs]\\n Read of size 4 at addr ffff8880099b819c by task a.out/342975\\n\\n CPU: 2 UID: 0 PID: 342975 Comm: a.out Not tainted 6.15.0-rc6+ #240 PREEMPT(full)\\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014\\n Call Trace:\\n  \u003cTASK\u003e\\n  dump_stack_lvl+0x53/0x70\\n  print_report+0xce/0x640\\n  kasan_report+0xb8/0xf0\\n  cifs_fill_dirent+0xb03/0xb60 [cifs]\\n  cifs_readdir+0x12cb/0x3190 [cifs]\\n  iterate_dir+0x1a1/0x520\\n  __x64_sys_getdents+0x134/0x220\\n  do_syscall_64+0x4b/0x110\\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n RIP: 0033:0x7f996f64b9f9\\n Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89\\n f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01\\n f0 ff ff  0d f7 c3 0c 00 f7 d8 64 89 8\\n RSP: 002b:00007f996f53de78 EFLAGS: 00000207 ORIG_RAX: 000000000000004e\\n RAX: ffffffffffffffda RBX: 00007f996f53ecdc RCX: 00007f996f64b9f9\\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\\n RBP: 00007f996f53dea0 R08: 0000000000000000 R09: 0000000000000000\\n R10: 0000000000000000 R11: 0000000000000207 R12: ffffffffffffff88\\n R13: 0000000000000000 R14: 00007ffc8cd9a500 R15: 00007f996f51e000\\n  \u003c/TASK\u003e\\n\\n Allocated by task 408:\\n  kasan_save_stack+0x20/0x40\\n  kasan_save_track+0x14/0x30\\n  __kasan_slab_alloc+0x6e/0x70\\n  kmem_cache_alloc_noprof+0x117/0x3d0\\n  mempool_alloc_noprof+0xf2/0x2c0\\n  cifs_buf_get+0x36/0x80 [cifs]\\n  allocate_buffers+0x1d2/0x330 [cifs]\\n  cifs_demultiplex_thread+0x22b/0x2690 [cifs]\\n  kthread+0x394/0x720\\n  ret_from_fork+0x34/0x70\\n  ret_from_fork_asm+0x1a/0x30\\n\\n Freed by task 342979:\\n  kasan_save_stack+0x20/0x40\\n  kasan_save_track+0x14/0x30\\n  kasan_save_free_info+0x3b/0x60\\n  __kasan_slab_free+0x37/0x50\\n  kmem_cache_free+0x2b8/0x500\\n  cifs_buf_release+0x3c/0x70 [cifs]\\n  cifs_readdir+0x1c97/0x3190 [cifs]\\n  iterate_dir+0x1a1/0x520\\n  __x64_sys_getdents64+0x134/0x220\\n  do_syscall_64+0x4b/0x110\\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n\\n The buggy address belongs to the object at ffff8880099b8000\\n  which belongs to the cache cifs_request of size 16588\\n The buggy address is located 412 bytes inside of\\n  freed 16588-byte region [ffff8880099b8000, ffff8880099bc0cc)\\n\\n The buggy address belongs to the physical page:\\n page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99b8\\n head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0\\n anon flags: 0x80000000000040(head|node=0|zone=1)\\n page_type: f5(slab)\\n raw: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001\\n raw: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000\\n head: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001\\n head: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000\\n head: 0080000000000003 ffffea0000266e01 00000000ffffffff 00000000ffffffff\\n head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008\\n page dumped because: kasan: bad access detected\\n\\n Memory state around the buggy address:\\n  ffff8880099b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n  ffff8880099b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n \u003effff8880099b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n                             ^\\n  ffff8880099b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n  ffff8880099b8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n ==================================================================\\n\\nPOC is available in the link [1].\\n\\nThe problem triggering process is as follows:\\n\\nProcess 1                       Process 2\\n-----------------------------------\\n---truncated---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b197931fbc821bc7e9e91bf619400db563e3338\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73cadde98f67f76c5eba00ac0b72c453383cec8b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9bea368648ac46f8593a780760362e40291d22a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c9aafbacc183598f064902365e107b5e856531f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a24c2f05ac3c5b0aaa539d9d913826d2643dfd0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a7a8fe56e932a36f43e031b398aef92341bf5ea0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aee067e88d61eb72e966f094e4749c6b14e7008f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c8623231e0edfcccb7cc6add0288fa0f0594282f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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