CVE-2023-53804

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode() During unmount process of nilfs2, nothing holds nilfs_root structure after nilfs2 detaches its writer in nilfs_detach_log_writer(). However, since nilfs_evict_inode() uses nilfs_root for some cleanup operations, it may cause use-after-free read if inodes are left in "garbage_list" and released by nilfs_dispose_list() at the end of nilfs_detach_log_writer(). Fix this issue by modifying nilfs_evict_inode() to only clear inode without additional metadata changes that use nilfs_root if the file system is degraded to read-only or the writer is detached.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/116d53f09ff52e6f98e3fe1f85d8898d6ba26c68
https://git.kernel.org/stable/c/2a782ea8ebd712a458466e3103e2881b4f886cb5
https://git.kernel.org/stable/c/6b4205ea97901f822004e6c8d59484ccfda03faa
https://git.kernel.org/stable/c/9b5a04ac3ad9898c4745cba46ea26de74ba56a8e
https://git.kernel.org/stable/c/acc2a40e428f12780004e1e9fce4722d88f909fd
https://git.kernel.org/stable/c/b8427b8522d9ede53015ba45a9978ba68d1162f5
https://git.kernel.org/stable/c/f31e18131ee2ce80a4da5c808221d25b1ae9ad6d
https://git.kernel.org/stable/c/fb8e8d58f116d069e5939e1f786ac84e7fa4533e

Configurations

No configuration.

History

No history.

Information

Published : 2025-12-09 01:16

Updated : 2026-08-04 10:19

NVD link : CVE-2023-53804

Mitre link : CVE-2023-53804

CVE.ORG link : CVE-2023-53804

JSON object : View

Products Affected

No product.

CWE

No CWE.

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However, since\nnilfs_evict_inode() uses nilfs_root for some cleanup operations, it may\ncause use-after-free read if inodes are left in \"garbage_list\" and\nreleased by nilfs_dispose_list() at the end of nilfs_detach_log_writer().\n\nFix this issue by modifying nilfs_evict_inode() to only clear inode\nwithout additional metadata changes that use nilfs_root if the file system\nis degraded to read-only or the writer is detached."}], "lastModified": "2026-08-04T10:19:22.083", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}