CVE-2025-21762

In the Linux kernel, the following vulnerability has been resolved:

arp: use RCU protection in arp_xmit()

arp_xmit() can be called without RTNL or RCU protection.

Use RCU protection to avoid potential UAF.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
LinuxCNA
---
---
CISA-ADPADP
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 2%
VendorProductVersion
linuxlinux_kernel
4.4 ≤
𝑥
< 5.4.291
linuxlinux_kernel
5.5 ≤
𝑥
< 5.10.235
linuxlinux_kernel
5.11 ≤
𝑥
< 5.15.179
linuxlinux_kernel
5.16 ≤
𝑥
< 6.1.129
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.79
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.16
linuxlinux_kernel
6.13 ≤
𝑥
< 6.13.4
linuxlinux_kernel
6.14:rc1
linuxlinux_kernel
6.14:rc2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
vulnerable
bullseye (security)
vulnerable
bookworm
6.1.129-1
fixed
bookworm (security)
vulnerable
trixie
6.12.20-1
fixed
sid
6.12.21-1
fixed
linux-6.1
bullseye (security)
6.1.129-1~deb11u1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe
https://git.kernel.org/stable/c/10f555e3f573d004ae9d89b3276abb58c4ede5c3
https://git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd
https://git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431
https://git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44
https://git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a
https://git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3
https://git.kernel.org/stable/c/f189654459423d4d48bef2d120b4bfba559e6039