CVE-2025-21766

EUVD-2025-5166
In the Linux kernel, the following vulnerability has been resolved:

ipv4: use RCU protection in __ip_rt_update_pmtu()

__ip_rt_update_pmtu() must use RCU protection to make
sure the net structure it reads does not disappear.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
4.14.200 ≤
𝑥
< 4.15
linuxlinux_kernel
4.19.148 ≤
𝑥
< 4.20
linuxlinux_kernel
5.4.68 ≤
𝑥
< 5.5
linuxlinux_kernel
5.8.12 ≤
𝑥
< 5.9
linuxlinux_kernel
5.9.1 ≤
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
5.9
linuxlinux_kernel
5.9:rc7
linuxlinux_kernel
5.9:rc8
linuxlinux_kernel
6.14:rc1
linuxlinux_kernel
6.14:rc2
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5 ≤
𝑥
< *
ADP
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5 ≤
𝑥
< *
ADP
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
V3.1.5 ≤
𝑥
< *
ADP
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
V3.1.5 ≤
𝑥
< *
ADP
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5 ≤
𝑥
< *
ADP
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.176-1
fixed
bookworm (security)
6.1.177-1
fixed
bullseye
vulnerable
bullseye (security)
vulnerable
forky
7.1.3-1
fixed
sid
7.1.3-1
fixed
trixie
6.12.94-1
fixed
trixie (security)
6.12.95-1
fixed
linux-6.1
bullseye (security)
6.1.176-1~deb11u1
fixed
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
cluster-md-kmp-default
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
dlm-kmp-default
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
gfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
kernel-64kb
suse enterprise desktop 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise desktop 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise sap 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.3.1
fixed
kernel-azure
suse enterprise sap 15 SP6
6.4.0-150600.8.34.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.20.3.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.8.34.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.20.3.1
fixed
kernel-default
suse enterprise desktop 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise desktop 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise sap 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.3.1
fixed
kernel-default-base
suse enterprise desktop 15 SP6
6.4.0-150600.23.47.2.150600.12.20.2
fixed
suse enterprise desktop 15 SP7
6.4.0-150700.53.3.1.150700.17.2.1
fixed
suse enterprise sap 15 SP6
6.4.0-150600.23.47.2.150600.12.20.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.3.1.150700.17.2.1
fixed
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1.150400.24.98.3
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1.150500.6.67.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.47.2.150600.12.20.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.3.1.150700.17.2.1
fixed
kernel-default-man
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
kernel-obs-build
suse enterprise desktop 15 SP6
6.4.0-150600.23.47.1
fixed
suse enterprise desktop 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise sap 15 SP6
6.4.0-150600.23.47.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.47.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.3.1
fixed
kernel-source
suse enterprise desktop 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise desktop 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise sap 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.3.1
fixed
kernel-source-azure
suse enterprise sap 15 SP6
6.4.0-150600.8.34.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.20.3.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.8.34.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.20.3.1
fixed
kernel-zfcpdump
suse enterprise desktop 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise desktop 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise sap 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.3.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.47.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.3.1
fixed
ocfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.255.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
reiserfs-kmp-default
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
bpftool
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
bpftool-debuginfo
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-debuginfo
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-debuginfo-common-aarch64
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-debuginfo-common-x86_64
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-devel
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-headers
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-libbpf
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-libbpf-devel
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-libbpf-static
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-livepatch-6.1.129-138.220
Amazon Linux 2023
0:1.0-0.amzn2023
fixed
kernel-modules-extra
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-modules-extra-common
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-tools
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-tools-debuginfo
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
kernel-tools-devel
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
perf
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
perf-debuginfo
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
python3-perf
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
python3-perf-debuginfo
Amazon Linux 2023
0:6.1.129-138.220.amzn2023
fixed
References
https://git.kernel.org/stable/c/139512191bd06f1b496117c76372b2ce372c9a41
https://git.kernel.org/stable/c/4583748b65dee4d61bd50a2214715b4237bc152a
https://git.kernel.org/stable/c/9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4
https://git.kernel.org/stable/c/a39f61d212d822b3062d7f70fa0588e50e55664e
https://git.kernel.org/stable/c/ce3c6165fce0f06305c806696882a3ad4b90e33f
https://git.kernel.org/stable/c/ea07480b23225942208f1b754fea1e7ec486d37e
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html