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

f2fs: fix information leak in f2fs_move_inline_dirents()

When converting an inline directory to a regular one, f2fs is leaking
uninitialized memory to disk because it doesn't initialize the entire
directory block. Fix this by zero-initializing the block.

This bug was introduced by commit 4ec17d688d74 ("f2fs: avoid unneeded
initializing when converting inline dentry"), which didn't consider the
security implications of leaking uninitialized memory to disk.

This was found by running xfstest generic/435 on a KMSAN-enabled kernel.

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 0.00036.

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
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < a6807ef0f3b3d8508d3b07a2e35de8a91820a014
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < 2bef8314fcf94ddc27e22d03f237c0fafd00de33
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < 00b5587326625d0fddb2a5f5a3d4acd950102ace
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < 117d4f6687b1f74423b5d398ea95c63b262a8e73
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < f07a8d61b6ea81bb3cbe0638af40f8824d6147fd
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < eebaecef0095bb8f493c03982da75c6e7bae1056
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca affected < 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5
Linux Linux affected
Version Status Constraints
4.3 affected —
0 unaffected < 4.3
4.14.308 unaffected ≤ 4.14.*
4.19.276 unaffected ≤ 4.19.*
5.4.235 unaffected ≤ 5.4.*
5.10.173 unaffected ≤ 5.10.*
5.15.99 unaffected ≤ 5.15.*
6.1.16 unaffected ≤ 6.1.*
6.2.3 unaffected ≤ 6.2.*
6.3 unaffected ≤ *

No data.

No data.

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/00b5587326625d0fddb2a5f5a3d4acd950102ace cve-icon cve-icon
https://git.kernel.org/stable/c/117d4f6687b1f74423b5d398ea95c63b262a8e73 cve-icon cve-icon
https://git.kernel.org/stable/c/2bef8314fcf94ddc27e22d03f237c0fafd00de33 cve-icon cve-icon
https://git.kernel.org/stable/c/4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7 cve-icon cve-icon
https://git.kernel.org/stable/c/9a5571cff4ffcfc24847df9fd545cc5799ac0ee5 cve-icon cve-icon
https://git.kernel.org/stable/c/a6807ef0f3b3d8508d3b07a2e35de8a91820a014 cve-icon cve-icon
https://git.kernel.org/stable/c/eebaecef0095bb8f493c03982da75c6e7bae1056 cve-icon cve-icon
https://git.kernel.org/stable/c/f07a8d61b6ea81bb3cbe0638af40f8824d6147fd cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025120941-CVE-2023-53796-4092@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53796 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53796 cve-icon
History

Wed, 10 Dec 2025 12:15:00 +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 00:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: f2fs: fix information leak in f2fs_move_inline_dirents() When converting an inline directory to a regular one, f2fs is leaking uninitialized memory to disk because it doesn't initialize the entire directory block. Fix this by zero-initializing the block. This bug was introduced by commit 4ec17d688d74 ("f2fs: avoid unneeded initializing when converting inline dentry"), which didn't consider the security implications of leaking uninitialized memory to disk. This was found by running xfstest generic/435 on a KMSAN-enabled kernel.
Title f2fs: fix information leak in f2fs_move_inline_dirents()
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: 2025-12-09T00:00:52.919Z

Reserved: 2025-12-08T23:58:35.275Z

Link: CVE-2023-53796

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-09T01:16:51.200

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

Link: CVE-2023-53796

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2023-53796 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.