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

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Main Vulnerability Database Vulnerabilities #VU128887

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

Published: May 2, 2026


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

Vulnerability details

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.


Affected software

Linux kernel
Debian Linux
Ubuntu
openEuler
linux-kvm (Ubuntu package)
linux-hwe (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws-hwe (Ubuntu package)
linux-azure-4.15 (Ubuntu package)
linux-gcp-4.15 (Ubuntu package)
linux-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-hwe-5.4 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-bluefield (Ubuntu package)
linux-ibm (Ubuntu package)
linux-iot (Ubuntu package)
linux-raspi (Ubuntu package)
linux-ibm-5.4 (Ubuntu package)
linux-aws-5.4 (Ubuntu package)
linux-azure-5.4 (Ubuntu package)
linux-oracle-5.4 (Ubuntu package)
linux-gcp-5.4 (Ubuntu package)
linux-raspi-5.4 (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-gke (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-realtime (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-intel-iotg-5.15 (Ubuntu package)
linux-oracle-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-lowlatency-hwe-6.8 (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
linux-ibm-6.8 (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-hwe-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
perf
kernel-tools
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
kernel-tools-debuginfo
kernel-tools-devel
perf-debuginfo
python2-perf
python2-perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel-headers
linux (Debian package)

How to mitigate CVE-2026-43033

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-kvm (Ubuntu package) - addressed in versions 4.15.0-1174.179, 5.4.0-1146.155, 5.15.0-1100.105
linux-hwe (Ubuntu package) - update to 4.15.0-250.262~16.04.1
linux-gcp (Ubuntu package) - addressed in versions 4.15.0-1185.202~16.04.1, 5.4.0-1162.171, 5.15.0-1108.117, 6.8.0-1058.61
linux-azure (Ubuntu package) - addressed in versions 4.15.0-1201.216~16.04.1, 5.4.0-1163.169, 5.15.0-1114.123, 6.8.0-1056.62, 6.17.0-1015.15
linux (Ubuntu package) - addressed in versions 4.15.0-250.262, 5.4.0-230.250, 5.15.0-179.189, 6.8.0-117.117, 6.17.0-29.29
linux-aws (Ubuntu package) - addressed in versions 4.15.0-1192.205, 5.4.0-1159.169, 5.15.0-1108.115, 6.8.0-1055.58, 6.17.0-1015.15
linux-oracle (Ubuntu package) - addressed in versions 4.15.0-1154.165~16.04.1, 4.15.0-1154.165, 5.4.0-1157.167, 5.15.0-1105.111, 6.17.0-1014.14
linux-aws-hwe (Ubuntu package) - update to 4.15.0-1192.205~16.04.1
linux-azure-4.15 (Ubuntu package) - update to 4.15.0-1201.216
linux-gcp-4.15 (Ubuntu package) - update to 4.15.0-1185.202
linux-fips (Ubuntu package) - addressed in versions 4.15.0-1147.159, 5.4.0-1133.143, 5.15.0-179.189+fips1
linux-gcp-fips (Ubuntu package) - addressed in versions 4.15.0-2093.99, 5.4.0-1162.171+fips1, 5.15.0-1108.117+fips1, 6.8.0-1058.61+fips1
linux-azure-fips (Ubuntu package) - addressed in versions 4.15.0-2110.116, 5.4.0-1163.169+fips1, 5.15.0-1114.123+fips1
linux-aws-fips (Ubuntu package) - addressed in versions 4.15.0-2130.136, 5.4.0-1159.169+fips1, 5.15.0-1108.115+fips1, 6.8.0-1055.58+fips1
linux-hwe-5.4 (Ubuntu package) - update to 5.4.0-231.251~18.04.1
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.4.0-1077.81, 5.15.0-1074.78
linux-bluefield (Ubuntu package) - update to 5.4.0-1118.125
linux-ibm (Ubuntu package) - addressed in versions 5.4.0-1105.110, 5.15.0-1102.105, 6.8.0-1055.56
linux-iot (Ubuntu package) - update to 5.4.0-1063.66
linux-raspi (Ubuntu package) - addressed in versions 5.4.0-1143.156, 5.15.0-1102.105, 6.8.0-1056.60, 6.17.0-1017.17
linux-ibm-5.4 (Ubuntu package) - update to 5.4.0-1105.110~18.04.1
linux-aws-5.4 (Ubuntu package) - update to 5.4.0-1160.170~18.04.1
linux-azure-5.4 (Ubuntu package) - update to 5.4.0-1163.169~18.04.1
linux-oracle-5.4 (Ubuntu package) - update to 5.4.0-1157.167~18.04.1
linux-gcp-5.4 (Ubuntu package) - update to 5.4.0-1162.171~18.04.1
linux-raspi-5.4 (Ubuntu package) - update to 5.4.0-1143.156~18.04.1
linux-lowlatency (Ubuntu package) - addressed in versions 5.15.0-179.189, 6.8.0-117.117.1
linux-gke (Ubuntu package) - addressed in versions 5.15.0-1104.110, 6.8.0-1054.60
linux-aws-5.15 (Ubuntu package) - update to 5.15.0-1108.115~20.04.1
linux-lowlatency-hwe-5.15 (Ubuntu package) - update to 5.15.0-179.189~20.04.1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-179.189~20.04.1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1114.123~20.04.1
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1049.49
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1102.105~20.04.1
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1103.104, 6.8.0-1054.57
linux-realtime (Ubuntu package) - addressed in versions 5.15.0-1107.116, 6.8.1-1051.52, 6.17.0-1013.15
linux-intel-iotg (Ubuntu package) - update to 5.15.0-1103.109
linux-gkeop (Ubuntu package) - addressed in versions 5.15.0-1091.99, 6.8.0-1041.44
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1060.60, 6.8.0-1025.25
linux-intel-iotg-5.15 (Ubuntu package) - update to 5.15.0-1103.109~20.04.1
linux-oracle-5.15 (Ubuntu package) - update to 5.15.0-1106.112~20.04.1
linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1108.117~20.04.1
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1060.60~20.04.1
linux-intel-iot-realtime (Ubuntu package) - update to 5.15.0-1100.102
linux-lowlatency-hwe-6.8 (Ubuntu package) - update to 6.8.0-117.117.1~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1054.57.1
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-ibm-6.8 (Ubuntu package) - update to 6.8.0-1055.56~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2045.46
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1051.52~22.04.1
linux-hwe-6.17 (Ubuntu package) - update to 6.17.0-29.29~24.04.1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1015.15~24.04.1
linux-oracle-6.17 (Ubuntu package) - update to 6.17.0-1014.14~24.04.1
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1023.23
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1026.26
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1013.15~24.04.1
perf - 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
kernel-tools-debuginfo - 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
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
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
kernel-headers - update to 5.10.0-317.0.0.220
linux (Debian package) - update to 6.1.170-1

External References

Related Security Bulletins