CVE-2026-43383

EUVD-2026-28689
In the Linux kernel, the following vulnerability has been resolved:

net/tcp-md5: Fix MAC comparison to be constant-time

To prevent timing attacks, MACs need to be compared in constant
time.  Use the appropriate helper function for this.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.4 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 35%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
2.6.20 ≤
𝑥
< 5.10.253
linuxlinux_kernel
5.11 ≤
𝑥
< 6.1.167
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.130
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.78
linuxlinux_kernel
6.13 ≤
𝑥
< 6.18.19
linuxlinux_kernel
6.19 ≤
𝑥
< 6.19.9
linuxlinux_kernel
7.0:rc1
linuxlinux_kernel
7.0:rc2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.170-3
fixed
bookworm (security)
6.1.174-1
fixed
bullseye
vulnerable
bullseye (security)
5.10.257-1
fixed
forky
7.0.12-2
fixed
sid
7.0.13-1
fixed
trixie
6.12.86-1
fixed
trixie (security)
6.12.94-1
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
1:6.12.79-101.147.amzn2023
fixed
bpftool6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
bpftool6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
bpftool6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.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-6.12.79-101.147
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.18.20-20.229
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
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-debuginfo-common-aarch64
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-debuginfo-common-x86_64
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-devel
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-headers
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf-devel
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf-static
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-modules-extra
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-modules-extra-common
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-tools
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-tools-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-tools-devel
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-debuginfo-common-aarch64
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-debuginfo-common-x86_64
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-devel
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-headers
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf-devel
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf-static
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-modules-extra
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-modules-extra-common
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-tools
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-tools-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-tools-devel
Amazon Linux 2023
1:6.18.20-20.229.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
1:6.12.79-101.147.amzn2023
fixed
perf6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
perf6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
perf6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.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
1:6.12.79-101.147.amzn2023
fixed
python3-perf6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
python3-perf6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
python3-perf6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed