In the Linux kernel, the following vulnerability has been resolved:

nilfs2: fix infinite loop in nilfs_mdt_get_block()

If the disk image that nilfs2 mounts is corrupted and a virtual block
address obtained by block lookup for a metadata file is invalid,
nilfs_bmap_lookup_at_level() may return the same internal return code as
-ENOENT, meaning the block does not exist in the metadata file.

This duplication of return codes confuses nilfs_mdt_get_block(), causing
it to read and create a metadata block indefinitely.

In particular, if this happens to the inode metadata file, ifile,
semaphore i_rwsem can be left held, causing task hangs in lock_mount.

Fix this issue by making nilfs_bmap_lookup_at_level() treat virtual block
address translation failures with -ENOENT as metadata corruption instead
of returning the error code.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00049.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
bdb265eae08db578e7cf5739be16f389d495fc75 affected < cfb0bb4fbd40c1f06da7e9f88c0a2d46155b90c2
bdb265eae08db578e7cf5739be16f389d495fc75 affected < d536f9976bb04e9c84cf80045a9355975e418f41
bdb265eae08db578e7cf5739be16f389d495fc75 affected < fe1cbbcb1a2532ee1654e1ff121be8906d83c6f0
bdb265eae08db578e7cf5739be16f389d495fc75 affected < 8a89d36a07afe1ed4564df51fefa2bb556c85412
bdb265eae08db578e7cf5739be16f389d495fc75 affected < 8d07d9119642ba43d21f8ba64d51d01931096b20
bdb265eae08db578e7cf5739be16f389d495fc75 affected < 25457d07c8146e57d28906c663def033dc425af6
bdb265eae08db578e7cf5739be16f389d495fc75 affected < 34c5f17222b50c79848bb03ec8811648813e6a45
bdb265eae08db578e7cf5739be16f389d495fc75 affected < 5b29661669cb65b9750a3cf70ed3eaf947b92167
bdb265eae08db578e7cf5739be16f389d495fc75 affected < a6a491c048882e7e424d407d32cba0b52d9ef2bf
Linux Linux affected
Version Status Constraints
2.6.30 affected —
0 unaffected < 2.6.30
4.14.315 unaffected ≤ 4.14.*
4.19.283 unaffected ≤ 4.19.*
5.4.243 unaffected ≤ 5.4.*
5.10.180 unaffected ≤ 5.10.*
5.15.111 unaffected ≤ 5.15.*
6.1.28 unaffected ≤ 6.1.*
6.2.15 unaffected ≤ 6.2.*
6.3.2 unaffected ≤ 6.3.*
6.4 unaffected ≤ *

No data.

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/25457d07c8146e57d28906c663def033dc425af6 cve-icon cve-icon
https://git.kernel.org/stable/c/34c5f17222b50c79848bb03ec8811648813e6a45 cve-icon cve-icon
https://git.kernel.org/stable/c/5b29661669cb65b9750a3cf70ed3eaf947b92167 cve-icon cve-icon
https://git.kernel.org/stable/c/8a89d36a07afe1ed4564df51fefa2bb556c85412 cve-icon cve-icon
https://git.kernel.org/stable/c/8d07d9119642ba43d21f8ba64d51d01931096b20 cve-icon cve-icon
https://git.kernel.org/stable/c/a6a491c048882e7e424d407d32cba0b52d9ef2bf cve-icon cve-icon
https://git.kernel.org/stable/c/cfb0bb4fbd40c1f06da7e9f88c0a2d46155b90c2 cve-icon cve-icon
https://git.kernel.org/stable/c/d536f9976bb04e9c84cf80045a9355975e418f41 cve-icon cve-icon
https://git.kernel.org/stable/c/fe1cbbcb1a2532ee1654e1ff121be8906d83c6f0 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025120959-CVE-2023-53845-b919@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53845 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53845 cve-icon
History

Wed, 10 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Tue, 09 Dec 2025 02:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix infinite loop in nilfs_mdt_get_block() If the disk image that nilfs2 mounts is corrupted and a virtual block address obtained by block lookup for a metadata file is invalid, nilfs_bmap_lookup_at_level() may return the same internal return code as -ENOENT, meaning the block does not exist in the metadata file. This duplication of return codes confuses nilfs_mdt_get_block(), causing it to read and create a metadata block indefinitely. In particular, if this happens to the inode metadata file, ifile, semaphore i_rwsem can be left held, causing task hangs in lock_mount. Fix this issue by making nilfs_bmap_lookup_at_level() treat virtual block address translation failures with -ENOENT as metadata corruption instead of returning the error code.
Title nilfs2: fix infinite loop in nilfs_mdt_get_block()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-01-05T10:33:03.587Z

Reserved: 2025-12-09T01:27:17.827Z

Link: CVE-2023-53845

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-09T16:17:24.860

Modified: 2025-12-09T18:37:13.640

Link: CVE-2023-53845

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-09T00:00:00Z

Links: CVE-2023-53845 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.