Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-43033

Vulnerability identifier: #VU128887

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-43033

CWE-ID: CWE-670

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of high-order sequence bits in authencesn when decrypting data out of place. A local user can trigger out-of-place decryption with a specially crafted data layout to cause a denial of service.

Linux kernel
Debian Linux
Ubuntu
openEuler
linux (Ubuntu package)
linux-aws-hwe (Ubuntu package)
python2-perf-debuginfo
python3-perf
python3-perf-debuginfo
python2-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
linux-aws-5.4 (Ubuntu package)
linux-iot (Ubuntu package)
linux-raspi (Ubuntu package)
kernel-headers
linux-lowlatency (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-azure (Ubuntu package)
linux (Debian package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 4.15.0.250.234, 4.15.0-250.262, 4.15.0.1147.144, 4.15.0-1147.159, 4.15.0.1154.159, 4.15.0-1154.165, 4.15.0.1174.165, 4.15.0-1174.179, 4.15.0.1185.198~16.04.1, 4.15.0-1185.202, 4.15.0.1192.190, 4.15.0-1192.205, 4.15.0.2093.91, 4.15.0-2093.99, 4.15.0.2130.124, 4.15.0-2130.136, 5.4.0.230.222, 5.4.0-230.250, 5.4.0.1077.77, 5.4.0-1077.81, 5.4.0-1105.110, 5.4.0-1105.110~18.04.1, 5.4.0.1105.134, 5.4.0.1118.114, 5.4.0-1118.125, 5.4.0.1133.130, 5.4.0-1133.143, 5.4.0.1146.142, 5.4.0-1146.155, 5.4.0.1157.151, 5.4.0-1157.167~18.04.1, 5.4.0.1159.106, 5.4.0.1159.156, 5.4.0-1159.169, 5.4.0-1159.169+fips1, 5.4.0.1162.104, 5.4.0.1162.164, 5.4.0-1162.171, 5.4.0-1162.171+fips1, 5.4.0-1162.171~18.04.1, 5.15.0.179.105, 5.15.0.179.163, 5.15.0-179.189+fips1, 5.15.0-179.189~20.04.1, 5.15.0-1060.60, 5.15.0-1060.60~20.04.1, 5.15.0.1091.90, 5.15.0-1091.99, 5.15.0.1100.96, 5.15.0-1100.105, 5.15.0.1102.98, 5.15.0.1102.100, 5.15.0-1102.105, 5.15.0-1102.105~20.04.1, 5.15.0.1103.102, 5.15.0.1103.103, 5.15.0-1103.104, 5.15.0-1103.109, 5.15.0-1103.109~20.04.1, 5.15.0.1104.103, 5.15.0-1104.110, 5.15.0.1105.101, 5.15.0-1105.111, 5.15.0.1107.111, 5.15.0-1107.116, 5.15.0.1108.98, 5.15.0.1108.104, 5.15.0.1108.111, 5.15.0-1108.115, 5.15.0-1108.115+fips1, 5.15.0-1108.115~20.04.1, 5.15.0-1108.117, 5.15.0-1108.117+fips1, 6.8.0-117.117, 6.8.0-117.117.1, 6.8.0-117.117.1~22.04.1, 6.8.0-1041.44, 6.8.0-1054.60, 6.8.0-1055.56, 6.8.0-1055.56~22.04.1, 6.8.0-1055.58+fips1, 6.8.0-1056.60, 6.8.0-1058.61, 6.8.0-1058.61+fips1, 6.8.0-2045.46, 6.8.1-1051.52, 6.8.1-1051.52~22.04.1, 6.17.0-29.29, 6.17.0-29.29~24.04.1, 6.17.0-1013.15, 6.17.0-1013.15~24.04.1, 6.17.0-1014.14, 6.17.0-1015.15, 6.17.0-1017.17, 6.17.0-1023.23
linux-aws-hwe (Ubuntu package) - addressed in versions 4.15.0-250.262~16.04.1, 4.15.0-1154.165~16.04.1, 4.15.0-1185.202~16.04.1, 4.15.0-1192.205~16.04.1, 4.15.0-1201.216~16.04.1
python2-perf-debuginfo - update to 4.19.90-2605.5.0.0374
python3-perf - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
python3-perf-debuginfo - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
python2-perf - update to 4.19.90-2605.5.0.0374
perf-debuginfo - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
perf - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel-tools-devel - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel-tools-debuginfo - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel-tools - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel-source - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel-devel - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel-debugsource - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel-debuginfo - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
bpftool-debuginfo - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
bpftool - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
kernel - addressed in versions 4.19.90-2605.5.0.0374, 5.10.0-317.0.0.220
linux-aws-5.4 (Ubuntu package) - addressed in versions 5.4.0-231.251~18.04.1, 5.4.0-1160.170~18.04.1
linux-iot (Ubuntu package) - update to 5.4.0-1063.66
linux-raspi (Ubuntu package) - addressed in versions 5.4.0-1143.156, 5.4.0-1143.156~18.04.1, 5.4.0.1143.174
kernel-headers - update to 5.10.0-317.0.0.220
linux-lowlatency (Ubuntu package) - addressed in versions 5.15.0.179.151, 5.15.0-179.189
linux-lowlatency-hwe-5.15 (Ubuntu package) - update to 5.15.0-179.189~20.04.1
linux-nvidia-tegra-igx (Ubuntu package) - addressed in versions 5.15.0-1049.49, 5.15.0.1049.51
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0.1074.77, 5.15.0-1074.78
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1100.102, 5.15.0.1100.104
linux-azure-5.15 (Ubuntu package) - addressed in versions 5.15.0.1114.99, 5.15.0-1114.123+fips1, 5.15.0-1114.123~20.04.1
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1114.112, 5.15.0-1114.123, 6.8.0-1056.62, 6.17.0-1015.15, 6.17.0-1015.15~24.04.1
linux (Debian package) - update to 6.1.170-1
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1025.25
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1054.57, 6.8.0-1054.57.1
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-oracle-6.17 (Ubuntu package) - update to 6.17.0-1014.14~24.04.1
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1026.26

• https://git.kernel.org/stable/c/153d5520c3f9fd62e71c7e7f9e34b59cf411e555
• https://git.kernel.org/stable/c/5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5
• https://git.kernel.org/stable/c/89fe118b6470119b20c04afc36e45b81a69ea11f
• https://git.kernel.org/stable/c/8c62f618576519dbed6816fafc623ce592953025
• https://git.kernel.org/stable/c/cded4002d22177e8deaca1f257ecd932c9582b6b
• https://git.kernel.org/stable/c/d0c4ff6812386880f30bc64c2921299cc4d7b47f
• https://git.kernel.org/stable/c/d589abd8b019b07075fda255ceab8c8e950cdb3f
• https://git.kernel.org/stable/c/e02494114ebf7c8b42777c6cd6982f113bfdbec7

• Always-Incorrect Control Flow Implementation in Linux kernel crypto
• Debian update for linux
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-oracle-6.17
• Ubuntu update for linux-nvidia-tegra-igx
• Ubuntu update for linux-nvidia-6.8
• Ubuntu update for linux-intel-iot-realtime
• Ubuntu update for linux-iot
• Ubuntu update for linux-lowlatency-hwe-5.15
• Ubuntu update for linux-azure
• Ubuntu update for linux-azure
• openEuler 20.03 LTS SP4 update for kernel
• Ubuntu update for linux-lowlatency
• Ubuntu update for linux-nvidia-tegra
• openEuler 22.03 LTS SP4 update for kernel
• Ubuntu update for linux-aws-5.4
• Ubuntu update for linux-raspi
• Ubuntu update for linux-azure-5.15
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws-hwe
• Ubuntu update for linux-nvidia-6.17
• Ubuntu update for linux-xilinx-zynqmp