arp: use RCU protection in arp_xmit()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-21762
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: arp: use RCU protection in arp_xmit() arp_xmit() 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 29a26a56803855a79dbd028cd61abee56237d6e5 10f555e3f573d004ae9d89b3276abb58c4ede5c3 git Not specified
CNA Linux Linux affected 29a26a56803855a79dbd028cd61abee56237d6e5 307cd1e2d3cb1cbc6c40c679cada6d7168b18431 git Not specified
CNA Linux Linux affected 29a26a56803855a79dbd028cd61abee56237d6e5 d9366ac2f956a1948b68c0500f84a3462ff2ed8a git Not specified
CNA Linux Linux affected 29a26a56803855a79dbd028cd61abee56237d6e5 f189654459423d4d48bef2d120b4bfba559e6039 git Not specified
CNA Linux Linux affected 29a26a56803855a79dbd028cd61abee56237d6e5 e9f4dee534eb1b225b0a120395ad9bc2afe164d3 git Not specified
CNA Linux Linux affected 29a26a56803855a79dbd028cd61abee56237d6e5 01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe git Not specified
CNA Linux Linux affected 29a26a56803855a79dbd028cd61abee56237d6e5 2c331718d3389b6c5f6855078ab7171849e016bd git Not specified
CNA Linux Linux affected 29a26a56803855a79dbd028cd61abee56237d6e5 a42b69f692165ec39db42d595f4f65a4c8f42e44 git Not specified
CNA Linux Linux affected 4.4 Not specified
CNA Linux Linux unaffected 4.4 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 - BIOS affected * custom 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-503939.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/10f555e3f573d004ae9d89b3276abb58c4ede5c3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd 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/f189654459423d4d48bef2d120b4bfba559e6039 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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