In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: Rework scratch handling for READ_PLUS (again) I found that the read code might send multiple requests using the same nfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is how we ended up occasionally double-freeing the scratch buffer, but also means we set a NULL pointer but non-zero length to the xdr scratch buffer. This results in an oops the first time decoding needs to copy something to scratch, which frequently happens when decoding READ_PLUS hole segments. I fix this by moving scratch handling into the pageio read code. I provide a function to allocate scratch space for decoding read replies, and free the scratch buffer when the nfs_pgio_header is freed.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/303a78052091c81e9003915c521fdca1c7e117af cve-icon cve-icon
https://git.kernel.org/stable/c/a2f4cb206bd94b3f4a7bb05fcdce9525283b5681 cve-icon cve-icon
https://git.kernel.org/stable/c/adac9f0ddd2b291c7ce41f549fdb27a13616cff5 cve-icon cve-icon
https://git.kernel.org/stable/c/ae5d5672f1db711e91db6f52df5cb16ecd8f5692 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025091722-CVE-2023-53360-a553@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53360 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53360 cve-icon
History

Thu, 18 Sep 2025 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 18 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important

Wed, 17 Sep 2025 15:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: Rework scratch handling for READ_PLUS (again) I found that the read code might send multiple requests using the same nfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is how we ended up occasionally double-freeing the scratch buffer, but also means we set a NULL pointer but non-zero length to the xdr scratch buffer. This results in an oops the first time decoding needs to copy something to scratch, which frequently happens when decoding READ_PLUS hole segments. I fix this by moving scratch handling into the pageio read code. I provide a function to allocate scratch space for decoding read replies, and free the scratch buffer when the nfs_pgio_header is freed.
Title NFSv4.2: Rework scratch handling for READ_PLUS (again)
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-09-17T14:56:50.287Z

Updated: 2025-09-17T14:56:50.287Z

Reserved: 2025-09-17T14:54:09.733Z

Link: CVE-2023-53360

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-17T15:15:40.123

Modified: 2025-09-18T13:43:34.310

Link: CVE-2023-53360

cve-icon Redhat

Severity : Important

Publid Date: 2025-09-17T00:00:00Z

Links: CVE-2023-53360 - Bugzilla