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

neighbour: use RCU protection in __neigh_notify()

__neigh_notify() can be called without RTNL or RCU protection.

Use RCU protection to avoid potential UAF.

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 0.00037.

Exploitation none

Automatable no

Technical Impact total

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
426b5303eb435d98b9bee37a807be386bc2b3320 affected < e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32
426b5303eb435d98b9bee37a807be386bc2b3320 affected < 8666e9aab801328c1408a19fbf4070609dc0695a
426b5303eb435d98b9bee37a807be386bc2b3320 affected < 40d8f2f2a373b6c294ffac394d2bb814b572ead1
426b5303eb435d98b9bee37a807be386bc2b3320 affected < 784eb2376270e086f7db136d154b8404edacf97b
426b5303eb435d98b9bee37a807be386bc2b3320 affected < 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379
426b5303eb435d98b9bee37a807be386bc2b3320 affected < cdd5c2a12ddad8a77ce1838ff9f29aa587de82df
426b5303eb435d98b9bee37a807be386bc2b3320 affected < 559307d25235e24b5424778c7332451b6c741159
426b5303eb435d98b9bee37a807be386bc2b3320 affected < becbd5850c03ed33b232083dd66c6e38c0c0e569
Linux Linux affected
Version Status Constraints
2.6.25 affected —
0 unaffected < 2.6.25
5.4.291 unaffected ≤ 5.4.*
5.10.235 unaffected ≤ 5.10.*
5.15.179 unaffected ≤ 5.15.*
6.1.129 unaffected ≤ 6.1.*
6.6.79 unaffected ≤ 6.6.*
6.12.16 unaffected ≤ 6.12.*
6.13.4 unaffected ≤ 6.13.*
6.14 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*

No data.

No data.

Project Subscriptions

Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4102-1 linux-6.1 security update
Debian DLA Debian DLA DLA-4178-1 linux security update
EUVD EUVD EUVD-2025-5167 In the Linux kernel, the following vulnerability has been resolved: neighbour: use RCU protection in __neigh_notify() __neigh_notify() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
Ubuntu USN Ubuntu USN USN-7510-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7510-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7510-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7510-4 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7510-5 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7510-6 Linux kernel (AWS FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7510-7 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7510-8 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7511-1 Linux kernel (GCP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7511-2 Linux kernel (GCP FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7511-3 Linux kernel (GKE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7512-1 Linux kernel (GCP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-2 Linux kernel (GCP FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-4 Linux kernel (Oracle) vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-5 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-6 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-7 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-8 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7516-9 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7517-1 Linux kernel (Xilinx ZynqMP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7517-2 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7517-3 Linux kernel (BlueField) vulnerabilities
Ubuntu USN Ubuntu USN USN-7518-1 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7521-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7521-2 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7521-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7539-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-7540-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-7593-1 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7602-1 Linux kernel (Xilinx ZynqMP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7640-1 Linux kernel (IoT) vulnerabilities
Ubuntu USN Ubuntu USN USN-7703-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7703-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7703-3 Linux kernel (Oracle) vulnerabilities
Ubuntu USN Ubuntu USN USN-7703-4 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7719-1 Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7737-1 Linux kernel (Azure) vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379 cve-icon cve-icon
https://git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1 cve-icon cve-icon
https://git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159 cve-icon cve-icon
https://git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b cve-icon cve-icon
https://git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a cve-icon cve-icon
https://git.kernel.org/stable/c/becbd5850c03ed33b232083dd66c6e38c0c0e569 cve-icon cve-icon
https://git.kernel.org/stable/c/cdd5c2a12ddad8a77ce1838ff9f29aa587de82df cve-icon cve-icon
https://git.kernel.org/stable/c/e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html cve-icon
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html cve-icon
https://lore.kernel.org/linux-cve-announce/2025022604-CVE-2025-21763-dcff@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-21763 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-21763 cve-icon
History

Mon, 03 Nov 2025 20:30:00 +0000

Type Values Removed Values Added
References

Fri, 21 Mar 2025 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Thu, 13 Mar 2025 12:30:00 +0000

Type Values Removed Values Added
References

Tue, 04 Mar 2025 03:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sat, 01 Mar 2025 03:00:00 +0000

Type Values Removed Values Added
Metrics threat_severity

Important

 threat_severity

Moderate

Fri, 28 Feb 2025 02:00:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Important

Thu, 27 Feb 2025 18:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics 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'}

Thu, 27 Feb 2025 02:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: neighbour: use RCU protection in __neigh_notify() __neigh_notify() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
Title neighbour: use RCU protection in __neigh_notify()
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-11-03T19:37:14.329Z

Reserved: 2024-12-29T08:45:45.761Z

Link: CVE-2025-21763

cve-icon Vulnrichment

Updated: 2025-11-03T19:37:14.329Z

cve-icon NVD

Status : Modified

Published: 2025-02-27T03:15:16.960

Modified: 2025-11-03T20:17:15.987

Link: CVE-2025-21763

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-02-27T00:00:00Z

Links: CVE-2025-21763 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses