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

NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL

OPDESC() simply indexes into nfsd4_ops[] by the op's operation
number, without range checking that value. It assumes callers are
careful to avoid calling it with an out-of-bounds opnum value.

nfsd4_decode_compound() is not so careful, and can invoke OPDESC()
with opnum set to OP_ILLEGAL, which is 10044 -- well beyond the end
of nfsd4_ops[].

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

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.

The EPSS score is 0.00027.

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
f4f9ef4a1b0a1ca80b152e28e176d69515bdf7e8 affected < 50827896c365e0f6c8b55ed56d444dafd87c92c5
f4f9ef4a1b0a1ca80b152e28e176d69515bdf7e8 affected < a64160124d5a078be0c380b1e8a0bad2d040d3a1
f4f9ef4a1b0a1ca80b152e28e176d69515bdf7e8 affected < ffcbcf087581ae68ddc0a21460f7ecd4315bdd0e
f4f9ef4a1b0a1ca80b152e28e176d69515bdf7e8 affected < f352c41fa718482979e7e6b71b4da2b718e381cc
f4f9ef4a1b0a1ca80b152e28e176d69515bdf7e8 affected < 804d8e0a6e54427268790472781e03bc243f4ee3
Linux Linux affected
Version Status Constraints
4.14 affected —
0 unaffected < 4.14
5.10.220 unaffected ≤ 5.10.*
5.15.107 unaffected ≤ 5.15.*
6.1.24 unaffected ≤ 6.1.*
6.2.11 unaffected ≤ 6.2.*
6.3 unaffected ≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*

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/50827896c365e0f6c8b55ed56d444dafd87c92c5 cve-icon cve-icon
https://git.kernel.org/stable/c/804d8e0a6e54427268790472781e03bc243f4ee3 cve-icon cve-icon
https://git.kernel.org/stable/c/a64160124d5a078be0c380b1e8a0bad2d040d3a1 cve-icon cve-icon
https://git.kernel.org/stable/c/f352c41fa718482979e7e6b71b4da2b718e381cc cve-icon cve-icon
https://git.kernel.org/stable/c/ffcbcf087581ae68ddc0a21460f7ecd4315bdd0e cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025100708-CVE-2023-53680-501d@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53680 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53680 cve-icon
History

Tue, 03 Feb 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*
Metrics 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'}

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Wed, 08 Oct 2025 13:45:00 +0000

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

Wed, 08 Oct 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

Tue, 07 Oct 2025 15:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL OPDESC() simply indexes into nfsd4_ops[] by the op's operation number, without range checking that value. It assumes callers are careful to avoid calling it with an out-of-bounds opnum value. nfsd4_decode_compound() is not so careful, and can invoke OPDESC() with opnum set to OP_ILLEGAL, which is 10044 -- well beyond the end of nfsd4_ops[].
Title NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-07T15:21:34.626Z

Reserved: 2025-10-07T15:16:59.664Z

Link: CVE-2023-53680

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2025-10-07T16:15:52.160

Modified: 2026-02-03T18:26:18.283

Link: CVE-2023-53680

cve-icon Redhat

Severity : Important

Publid Date: 2025-10-07T00:00:00Z

Links: CVE-2023-53680 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-08T13:35:23Z

Weaknesses