CVE-2024-46796 (GCVE-0-2024-46796)

Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2026-08-05 11:38
VLAI
Title
smb: client: fix double put of @cfile in smb2_set_path_size()
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double put of @cfile in smb2_set_path_size() If smb2_compound_op() is called with a valid @cfile and returned -EINVAL, we need to call cifs_get_writable_path() before retrying it as the reference of @cfile was already dropped by previous call. This fixes the following KASAN splat when running fstests generic/013 against Windows Server 2022: CIFS: Attempting to mount //w22-fs0/scratch run fstests generic/013 at 2024-09-02 19:48:59 ================================================================== BUG: KASAN: slab-use-after-free in detach_if_pending+0xab/0x200 Write of size 8 at addr ffff88811f1a3730 by task kworker/3:2/176 CPU: 3 UID: 0 PID: 176 Comm: kworker/3:2 Not tainted 6.11.0-rc6 #2 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 Workqueue: cifsoplockd cifs_oplock_break [cifs] Call Trace: <TASK> dump_stack_lvl+0x5d/0x80 ? detach_if_pending+0xab/0x200 print_report+0x156/0x4d9 ? detach_if_pending+0xab/0x200 ? __virt_addr_valid+0x145/0x300 ? __phys_addr+0x46/0x90 ? detach_if_pending+0xab/0x200 kasan_report+0xda/0x110 ? detach_if_pending+0xab/0x200 detach_if_pending+0xab/0x200 timer_delete+0x96/0xe0 ? __pfx_timer_delete+0x10/0x10 ? rcu_is_watching+0x20/0x50 try_to_grab_pending+0x46/0x3b0 __cancel_work+0x89/0x1b0 ? __pfx___cancel_work+0x10/0x10 ? kasan_save_track+0x14/0x30 cifs_close_deferred_file+0x110/0x2c0 [cifs] ? __pfx_cifs_close_deferred_file+0x10/0x10 [cifs] ? __pfx_down_read+0x10/0x10 cifs_oplock_break+0x4c1/0xa50 [cifs] ? __pfx_cifs_oplock_break+0x10/0x10 [cifs] ? lock_is_held_type+0x85/0xf0 ? mark_held_locks+0x1a/0x90 process_one_work+0x4c6/0x9f0 ? find_held_lock+0x8a/0xa0 ? __pfx_process_one_work+0x10/0x10 ? lock_acquired+0x220/0x550 ? __list_add_valid_or_report+0x37/0x100 worker_thread+0x2e4/0x570 ? __kthread_parkme+0xd1/0xf0 ? __pfx_worker_thread+0x10/0x10 kthread+0x17f/0x1c0 ? kthread+0xda/0x1c0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x31/0x60 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 1118: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0xaa/0xb0 cifs_new_fileinfo+0xc8/0x9d0 [cifs] cifs_atomic_open+0x467/0x770 [cifs] lookup_open.isra.0+0x665/0x8b0 path_openat+0x4c3/0x1380 do_filp_open+0x167/0x270 do_sys_openat2+0x129/0x160 __x64_sys_creat+0xad/0xe0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 83: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x70 poison_slab_object+0xe9/0x160 __kasan_slab_free+0x32/0x50 kfree+0xf2/0x300 process_one_work+0x4c6/0x9f0 worker_thread+0x2e4/0x570 kthread+0x17f/0x1c0 ret_from_fork+0x31/0x60 ret_from_fork_asm+0x1a/0x30 Last potentially related work creation: kasan_save_stack+0x30/0x50 __kasan_record_aux_stack+0xad/0xc0 insert_work+0x29/0xe0 __queue_work+0x5ea/0x760 queue_work_on+0x6d/0x90 _cifsFileInfo_put+0x3f6/0x770 [cifs] smb2_compound_op+0x911/0x3940 [cifs] smb2_set_path_size+0x228/0x270 [cifs] cifs_set_file_size+0x197/0x460 [cifs] cifs_setattr+0xd9c/0x14b0 [cifs] notify_change+0x4e3/0x740 do_truncate+0xfa/0x180 vfs_truncate+0x195/0x200 __x64_sys_truncate+0x109/0x150 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 14:22 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6666 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1e60bc0e954389af82f1d9a85f13a63f6572350f , < 5a72d1edb0843e4c927a4096f81e631031c25c28 (git)
Affected: 71f15c90e785d1de4bcd65a279e7256684c25c0d , < 762099898309218b4a7954f3d49e985dc4dfd638 (git)
Affected: 71f15c90e785d1de4bcd65a279e7256684c25c0d , < f9c169b51b6ce20394594ef674d6b10efba31220 (git)
Affected: 6.6.32 , < 6.6.51 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double put of @cfile in smb2_set_path_size()\n\nIf smb2_compound_op() is called with a valid @cfile and returned\n-EINVAL, we need to call cifs_get_writable_path() before retrying it\nas the reference of @cfile was already dropped by previous call.\n\nThis fixes the following KASAN splat when running fstests generic/013\nagainst Windows Server 2022:\n\n  CIFS: Attempting to mount //w22-fs0/scratch\n  run fstests generic/013 at 2024-09-02 19:48:59\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in detach_if_pending+0xab/0x200\n  Write of size 8 at addr ffff88811f1a3730 by task kworker/3:2/176\n\n  CPU: 3 UID: 0 PID: 176 Comm: kworker/3:2 Not tainted 6.11.0-rc6 #2\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40\n  04/01/2014\n  Workqueue: cifsoplockd cifs_oplock_break [cifs]\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x5d/0x80\n   ? detach_if_pending+0xab/0x200\n   print_report+0x156/0x4d9\n   ? detach_if_pending+0xab/0x200\n   ? __virt_addr_valid+0x145/0x300\n   ? __phys_addr+0x46/0x90\n   ? detach_if_pending+0xab/0x200\n   kasan_report+0xda/0x110\n   ? detach_if_pending+0xab/0x200\n   detach_if_pending+0xab/0x200\n   timer_delete+0x96/0xe0\n   ? __pfx_timer_delete+0x10/0x10\n   ? rcu_is_watching+0x20/0x50\n   try_to_grab_pending+0x46/0x3b0\n   __cancel_work+0x89/0x1b0\n   ? __pfx___cancel_work+0x10/0x10\n   ? kasan_save_track+0x14/0x30\n   cifs_close_deferred_file+0x110/0x2c0 [cifs]\n   ? __pfx_cifs_close_deferred_file+0x10/0x10 [cifs]\n   ? __pfx_down_read+0x10/0x10\n   cifs_oplock_break+0x4c1/0xa50 [cifs]\n   ? __pfx_cifs_oplock_break+0x10/0x10 [cifs]\n   ? lock_is_held_type+0x85/0xf0\n   ? mark_held_locks+0x1a/0x90\n   process_one_work+0x4c6/0x9f0\n   ? find_held_lock+0x8a/0xa0\n   ? __pfx_process_one_work+0x10/0x10\n   ? lock_acquired+0x220/0x550\n   ? __list_add_valid_or_report+0x37/0x100\n   worker_thread+0x2e4/0x570\n   ? __kthread_parkme+0xd1/0xf0\n   ? __pfx_worker_thread+0x10/0x10\n   kthread+0x17f/0x1c0\n   ? kthread+0xda/0x1c0\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x31/0x60\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   \u003c/TASK\u003e\n\n  Allocated by task 1118:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   __kasan_kmalloc+0xaa/0xb0\n   cifs_new_fileinfo+0xc8/0x9d0 [cifs]\n   cifs_atomic_open+0x467/0x770 [cifs]\n   lookup_open.isra.0+0x665/0x8b0\n   path_openat+0x4c3/0x1380\n   do_filp_open+0x167/0x270\n   do_sys_openat2+0x129/0x160\n   __x64_sys_creat+0xad/0xe0\n   do_syscall_64+0xbb/0x1d0\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  Freed by task 83:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   kasan_save_free_info+0x3b/0x70\n   poison_slab_object+0xe9/0x160\n   __kasan_slab_free+0x32/0x50\n   kfree+0xf2/0x300\n   process_one_work+0x4c6/0x9f0\n   worker_thread+0x2e4/0x570\n   kthread+0x17f/0x1c0\n   ret_from_fork+0x31/0x60\n   ret_from_fork_asm+0x1a/0x30\n\n  Last potentially related work creation:\n   kasan_save_stack+0x30/0x50\n   __kasan_record_aux_stack+0xad/0xc0\n   insert_work+0x29/0xe0\n   __queue_work+0x5ea/0x760\n   queue_work_on+0x6d/0x90\n   _cifsFileInfo_put+0x3f6/0x770 [cifs]\n   smb2_compound_op+0x911/0x3940 [cifs]\n   smb2_set_path_size+0x228/0x270 [cifs]\n   cifs_set_file_size+0x197/0x460 [cifs]\n   cifs_setattr+0xd9c/0x14b0 [cifs]\n   notify_change+0x4e3/0x740\n   do_truncate+0xfa/0x180\n   vfs_truncate+0x195/0x200\n   __x64_sys_truncate+0x109/0x150\n   do_syscall_64+0xbb/0x1d0\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f"
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              "value": "AV:N - The retry path is entered solely on the SMB server\u0027s `STATUS_INVALID_PARAMETER` response to the compound SET_INFO(end-of-file), so a malicious or MITM SMB server on the connection deterministically drives the double put using only data it sends over TCP/445. The cifs client processing a remote peer\u0027s response is network-reachable code.\nAC:L - The server chooses the NT status byte-for-byte, so `map_smb2_to_linux_error()` yields -EINVAL on every attempt with no race, timing, or memory-layout precondition; the required non-NULL `cfile` is guaranteed by holding the file open for write (or by cifs deferred-close), and the sequence can be repeated indefinitely to groom the freed slab slot.\nPR:N - The attacking SMB server needs no credentials or privileges on the victim client \u2014 it merely answers a request the client already sent. On the alternate local path a plain unprivileged user with write access to a file on the mount reaches it via truncate(2), so no elevated privilege is required in either scenario.\nUI:N - On an already-mounted share no victim action is needed: ordinary write-back/setattr traffic reaches SMB2_OP_SET_EOF, and a local unprivileged attacker issues truncate(2) themselves against a real server (Windows Server 2022 returns the triggering status, per the fstests generic/013 reproducer). The mount is standing configuration, not a step of the exploit.\nS:U - The corruption is confined to kernel slab memory managed by the same kernel security authority as the cifs client; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The retry dereferences the already-released `cifsFileInfo` and sends `fid.persistent_fid`/`volatile_fid` read out of the freed slab object to the remote server, directly leaking reclaimed kernel heap contents to the attacker; the resulting use-after-free on a groomable kmalloc object additionally yields a general kernel-memory read primitive.\nI:H - KASAN confirms an 8-byte slab-use-after-free write (`detach_if_pending` on the freed `deferred_close_work` timer), and the extra `_cifsFileInfo_put()` performs `--count` plus `list_del()` on freed memory \u2014 attacker-sprayed contents turn these into controlled writes, the classic path to control-flow hijack and privilege escalation.\nA:H - The refcount underflow frees a `cifsFileInfo` still referenced by `struct file-\u003eprivate_data`, the tcon/inode open-file lists, the oplock-break work and the deferred-close timer, producing reliable oopses/panics from list and timer corruption; the KASAN splat in the commit shows the crash in the cifsoplockd workqueue."
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      "title": "smb: client: fix double put of @cfile in smb2_set_path_size()",
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    "cveId": "CVE-2024-46796",
    "datePublished": "2024-09-18T07:12:51.038Z",
    "dateReserved": "2024-09-11T15:12:18.279Z",
    "dateUpdated": "2026-08-05T11:38:36.399Z",
    "state": "PUBLISHED"
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      "date": "2026-10-16",
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      "percentile": "0.37046"
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    "microsoft_vex": {
      "current_release_date": "2026-02-21T02:09:15.000Z",
      "cve": "CVE-2024-46796",
      "id": "msrc_CVE-2024-46796",
      "initial_release_date": "2024-09-01T07:00:00.000Z",
      "product_status:fixed": "2",
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      "source": "Microsoft CSAF VEX",
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      "title": "smb: client: fix double put of @cfile in smb2_set_path_size()",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-46796.json",
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                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "8B3CE743-2126-47A3-8B7C-822B502CF119",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "4DEB27E7-30AA-45CC-8934-B89263EF3551",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "E0005AEF-856E-47EB-BFE4-90C46899394D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "39889A68-6D34-47A6-82FC-CD0BF23D6754",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "B8383ABF-1457-401F-9B61-EE50F4C61F4F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*",
                    "matchCriteriaId": "B77A9280-37E6-49AD-B559-5B23A3B1DC3D",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double put of @cfile in smb2_set_path_size()\n\nIf smb2_compound_op() is called with a valid @cfile and returned\n-EINVAL, we need to call cifs_get_writable_path() before retrying it\nas the reference of @cfile was already dropped by previous call.\n\nThis fixes the following KASAN splat when running fstests generic/013\nagainst Windows Server 2022:\n\n  CIFS: Attempting to mount //w22-fs0/scratch\n  run fstests generic/013 at 2024-09-02 19:48:59\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in detach_if_pending+0xab/0x200\n  Write of size 8 at addr ffff88811f1a3730 by task kworker/3:2/176\n\n  CPU: 3 UID: 0 PID: 176 Comm: kworker/3:2 Not tainted 6.11.0-rc6 #2\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40\n  04/01/2014\n  Workqueue: cifsoplockd cifs_oplock_break [cifs]\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x5d/0x80\n   ? detach_if_pending+0xab/0x200\n   print_report+0x156/0x4d9\n   ? detach_if_pending+0xab/0x200\n   ? __virt_addr_valid+0x145/0x300\n   ? __phys_addr+0x46/0x90\n   ? detach_if_pending+0xab/0x200\n   kasan_report+0xda/0x110\n   ? detach_if_pending+0xab/0x200\n   detach_if_pending+0xab/0x200\n   timer_delete+0x96/0xe0\n   ? __pfx_timer_delete+0x10/0x10\n   ? rcu_is_watching+0x20/0x50\n   try_to_grab_pending+0x46/0x3b0\n   __cancel_work+0x89/0x1b0\n   ? __pfx___cancel_work+0x10/0x10\n   ? kasan_save_track+0x14/0x30\n   cifs_close_deferred_file+0x110/0x2c0 [cifs]\n   ? __pfx_cifs_close_deferred_file+0x10/0x10 [cifs]\n   ? __pfx_down_read+0x10/0x10\n   cifs_oplock_break+0x4c1/0xa50 [cifs]\n   ? __pfx_cifs_oplock_break+0x10/0x10 [cifs]\n   ? lock_is_held_type+0x85/0xf0\n   ? mark_held_locks+0x1a/0x90\n   process_one_work+0x4c6/0x9f0\n   ? find_held_lock+0x8a/0xa0\n   ? __pfx_process_one_work+0x10/0x10\n   ? lock_acquired+0x220/0x550\n   ? __list_add_valid_or_report+0x37/0x100\n   worker_thread+0x2e4/0x570\n   ? __kthread_parkme+0xd1/0xf0\n   ? __pfx_worker_thread+0x10/0x10\n   kthread+0x17f/0x1c0\n   ? kthread+0xda/0x1c0\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x31/0x60\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   \u003c/TASK\u003e\n\n  Allocated by task 1118:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   __kasan_kmalloc+0xaa/0xb0\n   cifs_new_fileinfo+0xc8/0x9d0 [cifs]\n   cifs_atomic_open+0x467/0x770 [cifs]\n   lookup_open.isra.0+0x665/0x8b0\n   path_openat+0x4c3/0x1380\n   do_filp_open+0x167/0x270\n   do_sys_openat2+0x129/0x160\n   __x64_sys_creat+0xad/0xe0\n   do_syscall_64+0xbb/0x1d0\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  Freed by task 83:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   kasan_save_free_info+0x3b/0x70\n   poison_slab_object+0xe9/0x160\n   __kasan_slab_free+0x32/0x50\n   kfree+0xf2/0x300\n   process_one_work+0x4c6/0x9f0\n   worker_thread+0x2e4/0x570\n   kthread+0x17f/0x1c0\n   ret_from_fork+0x31/0x60\n   ret_from_fork_asm+0x1a/0x30\n\n  Last potentially related work creation:\n   kasan_save_stack+0x30/0x50\n   __kasan_record_aux_stack+0xad/0xc0\n   insert_work+0x29/0xe0\n   __queue_work+0x5ea/0x760\n   queue_work_on+0x6d/0x90\n   _cifsFileInfo_put+0x3f6/0x770 [cifs]\n   smb2_compound_op+0x911/0x3940 [cifs]\n   smb2_set_path_size+0x228/0x270 [cifs]\n   cifs_set_file_size+0x197/0x460 [cifs]\n   cifs_setattr+0xd9c/0x14b0 [cifs]\n   notify_change+0x4e3/0x740\n   do_truncate+0xfa/0x180\n   vfs_truncate+0x195/0x200\n   __x64_sys_truncate+0x109/0x150\n   do_syscall_64+0xbb/0x1d0\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: se corrige la doble colocaci\u00f3n de @cfile en smb2_set_path_size() Si se llama a smb2_compound_op() con un @cfile v\u00e1lido y se devuelve -EINVAL, debemos llamar a cifs_get_writable_path() antes de volver a intentarlo ya que la referencia de @cfile ya fue descartada por la llamada anterior. Esto corrige el siguiente error de KASAN al ejecutar fstests generic/013 contra Windows Server 2022: CIFS: Intentando montar //w22-fs0/scratch ejecutar fstests generic/013 a las 2024-09-02 19:48:59 ====================================================================== ERROR: KASAN: slab-use-after-free en detach_if_pending+0xab/0x200 Escritura de tama\u00f1o 8 en la direcci\u00f3n ffff88811f1a3730 por la tarea kworker/3:2/176 CPU: 3 UID: 0 PID: 176 Comm: kworker/3:2 No contaminado 6.11.0-rc6 #2 Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 01/04/2014 Cola de trabajo: cifsoplockd cifs_oplock_break [cifs] Seguimiento de llamadas:  dump_stack_lvl+0x5d/0x80 ? detach_if_pending+0xab/0x200 print_report+0x156/0x4d9 ? detach_if_pending+0xab/0x200 ? __virt_addr_valid+0x145/0x300 ? __phys_addr+0x46/0x90 ? detach_if_pending+0xab/0x200 kasan_report+0xda/0x110 ? detach_if_pending+0xab/0x200 detach_if_pending+0xab/0x200 timer_delete+0x96/0xe0 ? __pfx_timer_delete+0x10/0x10 ? rcu_is_watching+0x20/0x50 try_to_grab_pending+0x46/0x3b0 __cancel_work+0x89/0x1b0 ? __pfx___cancel_work+0x10/0x10 ? kasan_save_track+0x14/0x30 cifs_close_deferred_file+0x110/0x2c0 [cifs] ? __pfx_cifs_close_deferred_file+0x10/0x10 [cifs] ? __pfx_down_read+0x10/0x10 cifs_oplock_break+0x4c1/0xa50 [cifs] ? __pfx_cifs_oplock_break+0x10/0x10 [cifs] ? tipo_bloqueo_retenido+0x85/0xf0 ? marcar_bloqueos_retenidos+0x1a/0x90 proceso_una_obra+0x4c6/0x9f0 ? encontrar_bloqueo_retenido+0x8a/0xa0 ? __pfx_proceso_una_obra+0x10/0x10 ? bloqueo_adquirido+0x220/0x550 ? __lista_agregar_v\u00e1lido_o_informe+0x37/0x100 subproceso_trabajador+0x2e4/0x570 ? __pfx_kthread+0x10/0x10 ret_de_la_bifurcaci\u00f3n+0x31/0x60 ? Asignado por la tarea 1118: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0xaa/0xb0 cifs_new_fileinfo+0xc8/0x9d0 [cifs] cifs_atomic_open+0x467/0x770 [cifs] lookup_open.isra.0+0x665/0x8b0 path_openat+0x4c3/0x1380 do_filp_open+0x167/0x270 do_sys_openat2+0x129/0x160 __x64_sys_creat+0xad/0xe0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f Liberado por la tarea 83: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x70 poison_slab_object+0xe9/0x160 __kasan_slab_free+0x32/0x50 kfree+0xf2/0x300 process_one_work+0x4c6/0x9f0 worker_thread+0x2e4/0x570 kthread+0x17f/0x1c0 ret_from_fork+0x31/0x60 ret_from_fork_asm+0x1a/0x30 \u00daltima creaci\u00f3n de trabajo potencialmente relacionado: kasan_save_stack+0x30/0x50 __kasan_record_aux_stack+0xad/0xc0 insert_work+0x29/0xe0 __queue_work+0x5ea/0x760 queue_work_on+0x6d/0x90 _cifsFileInfo_put+0x3f6/0x770 [cifs] smb2_compound_op+0x911/0x3940 [cifs] smb2_set_path_size+0x228/0x270 [cifs] cifs_set_file_size+0x197/0x460 [cifs] cifs_setattr+0xd9c/0x14b0 [cifs] notificar_cambio+0x4e3/0x740 hacer_truncar+0xfa/0x180 vfs_truncar+0x195/0x200 __x64_sys_truncar+0x109/0x150 hacer_syscall_64+0xbb/0x1d0 entrada_SYSCALL_64_despu\u00e9s_hwframe+0x77/0x7f"
          }
        ],
        "id": "CVE-2024-46796",
        "lastModified": "2026-08-04T11:20:26.370",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
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                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T14:22:40.903539Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-09-18T08:15:06.340",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5a72d1edb0843e4c927a4096f81e631031c25c28"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/762099898309218b4a7954f3d49e985dc4dfd638"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f9c169b51b6ce20394594ef674d6b10efba31220"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-30T23:49:37+00:00",
      "cve": "CVE-2024-46796",
      "id": "CVE-2024-46796",
      "initial_release_date": "2024-09-18T00:00:00+00:00",
      "product_status:known_affected": "108",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: smb: client: fix double put of @cfile in smb2_set_path_size()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-46796.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-46796",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-09-29T14:22:40.903539Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-09-29T14:22:42.667Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "fs/smb/client/smb2inode.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "5a72d1edb0843e4c927a4096f81e631031c25c28",
                  "status": "affected",
                  "version": "1e60bc0e954389af82f1d9a85f13a63f6572350f",
                  "versionType": "git"
                },
                {
                  "lessThan": "762099898309218b4a7954f3d49e985dc4dfd638",
                  "status": "affected",
                  "version": "71f15c90e785d1de4bcd65a279e7256684c25c0d",
                  "versionType": "git"
                },
                {
                  "lessThan": "f9c169b51b6ce20394594ef674d6b10efba31220",
                  "status": "affected",
                  "version": "71f15c90e785d1de4bcd65a279e7256684c25c0d",
                  "versionType": "git"
                },
                {
                  "lessThan": "6.6.51",
                  "status": "affected",
                  "version": "6.6.32",
                  "versionType": "semver"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "fs/smb/client/smb2inode.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "6.9"
                },
                {
                  "lessThan": "6.9",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.51",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.10.*",
                  "status": "unaffected",
                  "version": "6.10.10",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.11",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.51",
                      "versionStartIncluding": "6.6.32",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.10.10",
                      "versionStartIncluding": "6.9",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.11",
                      "versionStartIncluding": "6.9",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double put of @cfile in smb2_set_path_size()\n\nIf smb2_compound_op() is called with a valid @cfile and returned\n-EINVAL, we need to call cifs_get_writable_path() before retrying it\nas the reference of @cfile was already dropped by previous call.\n\nThis fixes the following KASAN splat when running fstests generic/013\nagainst Windows Server 2022:\n\n  CIFS: Attempting to mount //w22-fs0/scratch\n  run fstests generic/013 at 2024-09-02 19:48:59\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in detach_if_pending+0xab/0x200\n  Write of size 8 at addr ffff88811f1a3730 by task kworker/3:2/176\n\n  CPU: 3 UID: 0 PID: 176 Comm: kworker/3:2 Not tainted 6.11.0-rc6 #2\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40\n  04/01/2014\n  Workqueue: cifsoplockd cifs_oplock_break [cifs]\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x5d/0x80\n   ? detach_if_pending+0xab/0x200\n   print_report+0x156/0x4d9\n   ? detach_if_pending+0xab/0x200\n   ? __virt_addr_valid+0x145/0x300\n   ? __phys_addr+0x46/0x90\n   ? detach_if_pending+0xab/0x200\n   kasan_report+0xda/0x110\n   ? detach_if_pending+0xab/0x200\n   detach_if_pending+0xab/0x200\n   timer_delete+0x96/0xe0\n   ? __pfx_timer_delete+0x10/0x10\n   ? rcu_is_watching+0x20/0x50\n   try_to_grab_pending+0x46/0x3b0\n   __cancel_work+0x89/0x1b0\n   ? __pfx___cancel_work+0x10/0x10\n   ? kasan_save_track+0x14/0x30\n   cifs_close_deferred_file+0x110/0x2c0 [cifs]\n   ? __pfx_cifs_close_deferred_file+0x10/0x10 [cifs]\n   ? __pfx_down_read+0x10/0x10\n   cifs_oplock_break+0x4c1/0xa50 [cifs]\n   ? __pfx_cifs_oplock_break+0x10/0x10 [cifs]\n   ? lock_is_held_type+0x85/0xf0\n   ? mark_held_locks+0x1a/0x90\n   process_one_work+0x4c6/0x9f0\n   ? find_held_lock+0x8a/0xa0\n   ? __pfx_process_one_work+0x10/0x10\n   ? lock_acquired+0x220/0x550\n   ? __list_add_valid_or_report+0x37/0x100\n   worker_thread+0x2e4/0x570\n   ? __kthread_parkme+0xd1/0xf0\n   ? __pfx_worker_thread+0x10/0x10\n   kthread+0x17f/0x1c0\n   ? kthread+0xda/0x1c0\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x31/0x60\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   \u003c/TASK\u003e\n\n  Allocated by task 1118:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   __kasan_kmalloc+0xaa/0xb0\n   cifs_new_fileinfo+0xc8/0x9d0 [cifs]\n   cifs_atomic_open+0x467/0x770 [cifs]\n   lookup_open.isra.0+0x665/0x8b0\n   path_openat+0x4c3/0x1380\n   do_filp_open+0x167/0x270\n   do_sys_openat2+0x129/0x160\n   __x64_sys_creat+0xad/0xe0\n   do_syscall_64+0xbb/0x1d0\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  Freed by task 83:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   kasan_save_free_info+0x3b/0x70\n   poison_slab_object+0xe9/0x160\n   __kasan_slab_free+0x32/0x50\n   kfree+0xf2/0x300\n   process_one_work+0x4c6/0x9f0\n   worker_thread+0x2e4/0x570\n   kthread+0x17f/0x1c0\n   ret_from_fork+0x31/0x60\n   ret_from_fork_asm+0x1a/0x30\n\n  Last potentially related work creation:\n   kasan_save_stack+0x30/0x50\n   __kasan_record_aux_stack+0xad/0xc0\n   insert_work+0x29/0xe0\n   __queue_work+0x5ea/0x760\n   queue_work_on+0x6d/0x90\n   _cifsFileInfo_put+0x3f6/0x770 [cifs]\n   smb2_compound_op+0x911/0x3940 [cifs]\n   smb2_set_path_size+0x228/0x270 [cifs]\n   cifs_set_file_size+0x197/0x460 [cifs]\n   cifs_setattr+0xd9c/0x14b0 [cifs]\n   notify_change+0x4e3/0x740\n   do_truncate+0xfa/0x180\n   vfs_truncate+0x195/0x200\n   __x64_sys_truncate+0x109/0x150\n   do_syscall_64+0xbb/0x1d0\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-23T15:53:33.606Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/5a72d1edb0843e4c927a4096f81e631031c25c28"
            },
            {
              "url": "https://git.kernel.org/stable/c/762099898309218b4a7954f3d49e985dc4dfd638"
            },
            {
              "url": "https://git.kernel.org/stable/c/f9c169b51b6ce20394594ef674d6b10efba31220"
            }
          ],
          "title": "smb: client: fix double put of @cfile in smb2_set_path_size()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-46796",
        "datePublished": "2024-09-18T07:12:51.038Z",
        "dateReserved": "2024-09-11T15:12:18.279Z",
        "dateUpdated": "2026-05-23T15:53:33.606Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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