CVE-2025-21760

HIGH

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 v3.1 Score

8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 2/27/2025Modified: 7/30/2026

Related Intelligence (1)

CRITICALAi

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

<p><a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-209-04.json"><strong>View CSAF</strong></a></p> <h2>Summary</h2> <p><strong>Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1.6 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). Siemens is preparing fix versions and recommend

CVE-2021-41617CVE-2023-28531
CISA Advisories

References (12)

https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594cPatchhttps://git.kernel.org/stable/c/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1Patchhttps://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bccPatchhttps://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67Patchhttps://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6dPatchhttps://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641dPatchhttps://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74dPatchhttps://git.kernel.org/stable/c/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640Patchhttps://lists.debian.org/debian-lts-announce/2025/03/msg00028.htmlhttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-019113.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-265688.html