CVE-2026-31447

EUVD-2026-24782
In the Linux kernel, the following vulnerability has been resolved:

ext4: reject mount if bigalloc with s_first_data_block != 0

bigalloc with s_first_data_block != 0 is not supported, reject mounting
it.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 3%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
3.2 ≤
𝑥
< 5.10.253
linuxlinux_kernel
5.11 ≤
𝑥
< 5.15.203
linuxlinux_kernel
5.16 ≤
𝑥
< 6.1.168
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.131
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.80
linuxlinux_kernel
6.13 ≤
𝑥
< 6.18.21
linuxlinux_kernel
6.19 ≤
𝑥
< 6.19.11
linuxlinux_kernel
7.0:rc1
linuxlinux_kernel
7.0:rc2
linuxlinux_kernel
7.0:rc3
linuxlinux_kernel
7.0:rc4
linuxlinux_kernel
7.0:rc5
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
V3.1.6 ≤
𝑥
< *
ADP
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5 ≤
𝑥
< *
ADP
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.6 ≤
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
V3.1.6 ≤
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
V3.1.6 ≤
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
V3.1.6 ≤
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)
5.10.259-1
fixed
forky
7.1.3-1
fixed
sid
7.1.4-1
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
4.12.14-122.317.1
fixed
dlm-kmp-default
suse enterprise server 12 SP5
4.12.14-122.317.1
fixed
gfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.317.1
fixed
kernel-default
suse enterprise server 12 SP5
4.12.14-122.317.1
fixed
kernel-default-base
suse enterprise server 12 SP5
4.12.14-122.317.1
fixed
kernel-default-man
suse enterprise server 12 SP5
4.12.14-122.317.1
fixed
kernel-source
suse enterprise server 12 SP5
4.12.14-122.317.1
fixed
ocfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.317.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
bpftool
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
bpftool-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
bpftool6.12
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
bpftool6.12-debuginfo
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
bpftool6.18
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
bpftool6.18-debuginfo
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-debuginfo-common-aarch64
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-debuginfo-common-x86_64
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-devel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-headers
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf-devel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf-static
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-livepatch-6.1.168-202.320
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.12.80-105.147
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.18.25-52.107
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-modules-extra
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-modules-extra-common
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-tools
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-tools-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-tools-devel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel6.12
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-debuginfo
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-debuginfo-common-aarch64
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-debuginfo-common-x86_64
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-devel
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-headers
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-libbpf
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-libbpf-debuginfo
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-libbpf-devel
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-libbpf-static
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-modules-extra
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-modules-extra-common
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-tools
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-tools-debuginfo
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.12-tools-devel
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
kernel6.18
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-debuginfo
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-debuginfo-common-aarch64
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-debuginfo-common-x86_64
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-devel
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-headers
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-modules-extra
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-modules-extra-common
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-tools
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-tools-debuginfo
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
kernel6.18-tools-devel
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
perf
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
perf-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
perf6.12
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
perf6.12-debuginfo
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
perf6.18
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
perf6.18-debuginfo
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
python3-perf
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
python3-perf-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
python3-perf6.12
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
python3-perf6.12-debuginfo
Amazon Linux 2023
1:6.12.80-105.147.amzn2023
fixed
python3-perf6.18
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
python3-perf6.18-debuginfo
Amazon Linux 2023
1:6.18.25-52.107.amzn2023
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
kernel
Azure Linux 3.0
0:6.6.134.1-2.azl3
fixed
References
https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8
https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1
https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0
https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0
https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a
https://git.kernel.org/stable/c/ad1f6d608f33f59d21a3d025615d6786a6443998
https://git.kernel.org/stable/c/b77de3fceafbb39f30e4ff5dc986f863d5456417
https://git.kernel.org/stable/c/d787d3ae96648dc14a3b7ca8fde817177e82c1c7
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html