High 8.1Published Feb 26, 2025

CVE-2025-21760ndisc: extend RCU protection in ndisc_send_skb()

Updated under an hour ago (Oct 27, 2026, 2:50 AM 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: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a 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)	1762f7e88eb34f653b4a915be99a102e347dd45e builds before 10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1; 1762f7e88eb34f653b4a915be99a102e347dd45e builds before 4d576202b90b1b95a7c428a80b536f91b8201bcc; from 1762f7e88eb34f653b4a915be99a102e347dd45e before e24d225e4cb8cf108bde00b76594499b98f0a74d; from 1762f7e88eb34f653b4a915be99a102e347dd45e before a9319d800b5701e7f5e3fa71a5b7c4831fc20d6d; from 1762f7e88eb34f653b4a915be99a102e347dd45e before ae38982f521621c216fc2f5182cd091f4734641d; from 1762f7e88eb34f653b4a915be99a102e347dd45e before 789230e5a8c1097301afc802e242c79bc8835c67; 1762f7e88eb34f653b4a915be99a102e347dd45e builds before 04e05112f10354ffc3bb6cc796d553bab161594c; from 1762f7e88eb34f653b4a915be99a102e347dd45e before ed6ae1f325d3c43966ec1b62ac1459e2b8e45640	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	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
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	from 2.6.26 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/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1	patch
https://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bcc	patch
https://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74d	patch
https://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6d	patch
https://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641d	patch
https://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67	patch
https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594c	patch
https://git.kernel.org/stable/c/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640	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.