CVE-2026-43384

EUVD-2026-28690
In the Linux kernel, the following vulnerability has been resolved:

net/tcp-ao: 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
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 36%
Affected Products (NVD)
VendorProductVersion
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
5.10.223-1
fixed
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
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-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
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
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-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
Vulnerability Media Exposure
References
https://git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfe
https://git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fc
https://git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125
https://git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1c