CVE-2025-21764

HIGH EPSS 13.5%
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: 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 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
13.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥3.9  –  <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/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926
    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/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926
    Patch