High 8.1Published Feb 26, 2025

CVE-2025-21762arp: use RCU protection in arp_xmit()

Updated under an hour ago (Oct 27, 2026, 5:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In 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.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	29a26a56803855a79dbd028cd61abee56237d6e5 builds before 10f555e3f573d004ae9d89b3276abb58c4ede5c3; from 29a26a56803855a79dbd028cd61abee56237d6e5 before 307cd1e2d3cb1cbc6c40c679cada6d7168b18431; from 29a26a56803855a79dbd028cd61abee56237d6e5 before d9366ac2f956a1948b68c0500f84a3462ff2ed8a; from 29a26a56803855a79dbd028cd61abee56237d6e5 before f189654459423d4d48bef2d120b4bfba559e6039; from 29a26a56803855a79dbd028cd61abee56237d6e5 before e9f4dee534eb1b225b0a120395ad9bc2afe164d3; 29a26a56803855a79dbd028cd61abee56237d6e5 builds before 01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe; 29a26a56803855a79dbd028cd61abee56237d6e5 builds before 2c331718d3389b6c5f6855078ab7171849e016bd; from 29a26a56803855a79dbd028cd61abee56237d6e5 before a42b69f692165ec39db42d595f4f65a4c8f42e44	CNA record
Siemens SIMATIC S7-1500 TM MFP - BIOS siemens:simatic_s7_1500_tm_mfp_bios (from the name)	all versions	CISA ADP
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.4 before 5.4.291; from 5.5 before 5.10.235; from 5.11 before 5.15.179; from 5.16 before 6.1.129; from 6.2 before 6.6.79; from 6.7 before 6.12.16; from 6.13 before 6.13.4; 6.14; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/10f555e3f573d004ae9d89b3276abb58c4ede5c3	patch
https://git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431	patch
https://git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a	patch
https://git.kernel.org/stable/c/f189654459423d4d48bef2d120b4bfba559e6039	patch
https://git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3	patch
https://git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe	patch
https://git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd	patch
https://git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44	patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.