NVD

CVE-2025-21765 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU protection in ip6_default_advmss() ip6_default_advmss() needs rcu protection to make sure the net structure it reads does not disappear.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 5.5 MEDIUM

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-019113.html	siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-082556.html	siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-265688.html	siemens-SADP
https://git.kernel.org/stable/c/28de355b63ad42309ed5a03ee7c436c90512265b	kernel.org	Patch
https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a	kernel.org	Patch
https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2	kernel.org	Patch
https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8	kernel.org	Patch
https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8	kernel.org	Patch
https://git.kernel.org/stable/c/78ad057472d8c76e0602402269222f9f9c698790	kernel.org	Patch
https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e	kernel.org	Patch
https://git.kernel.org/stable/c/d02f30d220ef9511568a48dba8a9004c65f8d904	kernel.org	Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html	CVE
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html	CVE

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

CVE Modified by siemens-SADP 7/14/2026 9:17:23 AM

Action

Type

Old Value

New Value

Added

Reference

https://cert-portal.siemens.com/productcert/html/ssa-019113.html

Changed

Affected

[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]}]

Record truncated, showing 2048 of 2074 characters.
View Entire Change Record

[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custo

CVE Modified by kernel.org 6/17/2026 4:44:13 AM

Action

Type

Old Value

New Value

Added

Affected

Record truncated, showing 2048 of 2449 characters.
View Entire Change Record

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ipv6/route.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"78ad057472d8c76e0602402269222f9f9c698790","versionType":"git","status":"affected"},{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"d02f30d220ef9511568a48dba8a9004c65f8d904","versionType":"git","status":"affected"},{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"28de355b63ad42309ed5a03ee7c436c90512265b","versionType":"git","status":"affected"},{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"84212387caadb211cd9dadd6fd5563bd37dc1f5e","versionType":"git","status":"affected"},{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"4176a68b0db8fc74ac14fcd00ba8231371051dc2","versionType":"git","status":"affected"},{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"713a40c892f40300d63691d9f85b2a23b48fe1e8","versionType":"git","status":"affected"},{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"550ed693f47370502a71b85382e7f9e6417300b8","versionType":"git","status":"affected"},{"version":"5578689a4e3c04f2d43ea39736fd3fa396d80c6e","lessThan":"3c8ffcd248da34fc41e52a46e51505900115fc2a","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ipv6/route.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","lessThan":"2.6.26","versionType":"semver","status":"unaffected"},{"version":"5.4.291","lessThanOrEqual":"5.4.*","versionType":"semver","status":"unaffected"},{"version":"5.10.235","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.179","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.129","lessThanOrEqual":"6.1.*","versionType":"semver","statu

Initial Analysis by NIST 10/28/2025 4:49:49 PM

Action	Type	New Value
Added	CVSS V3.1	AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE	NVD-CWE-noinfo
Added	CPE Configuration	OR cpe:2.3:o:linux:linux_kernel:6.14:rc1::::::* cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.13 up to (excluding) 6.13.4 cpe:2.3:o:linux:linux_kernel:6.14:rc2::::::* cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.2 up to (excluding) 6.6.79 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.7 up to (excluding) 6.12.16 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.11 up to (excluding) 5.15.179 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 2.6.26 up to (excluding) 5.4.291 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.5 up to (excluding) 5.10.235 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.16 up to (excluding) 6.1.129
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/28de355b63ad42309ed5a03ee7c436c90512265b Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/78ad057472d8c76e0602402269222f9f9c698790 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/d02f30d220ef9511568a48dba8a9004c65f8d904 Types: Patch

New CVE Received from kernel.org 2/26/2025 10:15:17 PM

Action	Type	New Value
Added	Description	In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU protection in ip6_default_advmss() ip6_default_advmss() needs rcu protection to make sure the net structure it reads does not disappear.
Added	Reference	https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a
Added	Reference	https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2
Added	Reference	https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8
Added	Reference	https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8
Added	Reference	https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e

Quick Info

CVE Dictionary Entry:
CVE-2025-21765
NVD Published Date:
02/26/2025
NVD Last Modified:
07/14/2026
Source:
kernel.org

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2025-21765 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by siemens-SADP 7/14/2026 9:17:23 AM

CVE Modified by siemens-SADP 6/17/2026 4:44:13 AM

CVE Modified by kernel.org 6/17/2026 4:44:13 AM

CVE Modified by siemens-SADP 5/12/2026 9:16:36 AM

CVE Modified by CVE 11/03/2025 3:17:16 PM

Initial Analysis by NIST 10/28/2025 4:49:49 PM

CVE Modified by kernel.org 3/13/2025 9:15:53 AM

New CVE Received from kernel.org 2/26/2025 10:15:17 PM

Quick Info