High 7.8Published Feb 26, 2025

CVE-2025-21764ndisc: use RCU protection in ndisc_alloc_skb()

Updated under an hour ago (Oct 26, 2026, 5:50 PM ET)

Does this affect you?

It affects Linux and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible UAF.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/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)	from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before 96fc896d0e5b37c12808df797397fb16f3080879; from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1; from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before b870256dd2a5648d5ed2f22316b3ac29a7e5ed63; from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before 3c2d705f5adf5d860aaef90cb4211c0fde2ba66d; from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before 9e0ec817eb41a55327a46cd3ce331a9868d60304; from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before bbec88e4108e8d6fb468d3817fa652140a44ff28; from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before cd1065f92eb7ff21b9ba5308a86f33d1670bf926; from de09334b9326632bbf1a74bfd8b01866cbbf2f61 before 628e6d18930bbd21f2d4562228afe27694f66da9	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 3.9 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/96fc896d0e5b37c12808df797397fb16f3080879	patch
https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1	patch
https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63	patch
https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d	patch
https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304	patch
https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28	patch
https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926	patch
https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9	patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
1–10 of 14

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.