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Vulnerability record · CVE-2025-21760 · published 27 February 2025

CVE-2025-21760: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

8.1 CVSS 3.1 High EPSS 37% · top 1.5% CWE-416 · Use after free
8.1CVSS 3.1 base score
37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
30 Jul 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594c Patch
https://git.kernel.org/stable/c/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1 Patch
https://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bcc Patch
https://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67 Patch
https://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6d Patch
https://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641d Patch
https://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74d 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
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-265688.html

Track CVE-2025-21760 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2025-21760), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.