neighbour: use RCU protection in __neigh_notify()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-21763
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-02-27 03:15:16 UTC
Updated2026-05-12 13:16:35 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from ADP

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

Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32 git Not specified
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 8666e9aab801328c1408a19fbf4070609dc0695a git Not specified
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 40d8f2f2a373b6c294ffac394d2bb814b572ead1 git Not specified
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 784eb2376270e086f7db136d154b8404edacf97b git Not specified
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379 git Not specified
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 cdd5c2a12ddad8a77ce1838ff9f29aa587de82df git Not specified
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 559307d25235e24b5424778c7332451b6c741159 git Not specified
CNA Linux Linux affected 426b5303eb435d98b9bee37a807be386bc2b3320 becbd5850c03ed33b232083dd66c6e38c0c0e569 git Not specified
CNA Linux Linux affected 2.6.25 Not specified
CNA Linux Linux unaffected 2.6.25 semver Not specified
CNA Linux Linux unaffected 5.4.291 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.235 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.179 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.129 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.79 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.16 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13.4 6.13.* semver Not specified
CNA Linux Linux unaffected 6.14 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/05/msg00030.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/becbd5850c03ed33b232083dd66c6e38c0c0e569 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00028.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cdd5c2a12ddad8a77ce1838ff9f29aa587de82df 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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