CVE-2024-53167

MEDIUM EPSS 17.7%
Published Dec 27, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Dec 27, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: nfs/blocklayout: Don't attempt unregister for invalid block device Since commit d869da91cccb ("nfs/blocklayout: Fix premature PR key unregistration") an unmount of a pNFS SCSI layout-enabled NFS may dereference a NULL block_device in: bl_unregister_scsi+0x16/0xe0 [blocklayoutdriver] bl_free_device+0x70/0x80 [blocklayoutdriver] bl_free_deviceid_node+0x12/0x30 [blocklayoutdriver] nfs4_put_deviceid_node+0x60/0xc0 [nfsv4] nfs4_deviceid_purge_client+0x132/0x190 [nfsv4] unset_pnfs_layoutdriver+0x59/0x60 [nfsv4] nfs4_destroy_server+0x36/0x70 [nfsv4] nfs_free_server+0x23/0xe0 [nfs] deactivate_locked_super+0x30/0xb0 cleanup_mnt+0xba/0x150 task_work_run+0x59/0x90 syscall_exit_to_user_mode+0x217/0x220 do_syscall_64+0x8e/0x160 This happens because even though we were able to create the nfs4_deviceid_node, the lookup for the device was unable to attach the block device to the pnfs_block_dev. If we never found a block device to register, we can avoid this case with the PNFS_BDEV_REGISTERED flag. Move the deref behind the test for the flag.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
17.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥6.11  –  <6.11.11
linuxlinux_kernel*≥6.12  –  <6.12.2

References 3

  • git.kernel.org https://git.kernel.org/stable/c/3402704a424f34bbcca7f4a4503859357f422217
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3a4ce14d9a6b868e0787e4582420b721c04ee41e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/faa4bacfaeed827a4ca8cb8529a3ce65a9e8ef46
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/3402704a424f34bbcca7f4a4503859357f422217
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3a4ce14d9a6b868e0787e4582420b721c04ee41e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/faa4bacfaeed827a4ca8cb8529a3ce65a9e8ef46
    Patch