CVE-2025-21760

HIGH EPSS 94.6%
Published Feb 27, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
94.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥2.6.26  –  <5.4.291
linuxlinux_kernel*≥5.5  –  <5.10.235
linuxlinux_kernel*≥5.11  –  <5.15.179
linuxlinux_kernel*≥5.16  –  <6.1.129
linuxlinux_kernel*≥6.2  –  <6.6.79
linuxlinux_kernel*≥6.7  –  <6.12.16
linuxlinux_kernel*≥6.13  –  <6.13.4
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any

References 11

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • git.kernel.org https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bcc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bcc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640
    Patch