Out-of-bounds read in Linux kernel - CVE-2026-80717

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Main Vulnerability Database Vulnerabilities #VU146062

Out-of-bounds read in Linux kernel - CVE-2026-80717

Published: August 28, 2026


Vulnerability identifier: #VU146062
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80717
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in sctp_process_param() when processing a malformed SCTP Adaptation Layer Indication parameter in an INIT chunk. A remote attacker can send a specially crafted SCTP INIT request to disclose sensitive information.

When the malformed parameter is the last parameter in the INIT chunk, four bytes from the receive-buffer tail may be copied into the state cookie returned in the INIT ACK.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Micro
SUSE Linux Micro Extras
SUSE Linux Enterprise Live Patching
Ubuntu
openEuler
linux (Ubuntu package)
linux-kvm (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-oracle (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-fips (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-azure-fde-5.15 (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-realtime (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-ibm (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-xilinx-zynqmp (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
kgraft-patch-4_12_14-122_339-default
dlm-kmp-default
kernel-default
kernel-default-debuginfo
kernel-default-debugsource
kernel-default-kgraft
kernel-default-kgraft-devel
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-syms
dlm-kmp-default-debuginfo
kernel-default-devel
kernel-default-base-debuginfo
kernel-default-base
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default
cluster-md-kmp-default
kernel-default-devel-debuginfo
kernel-source
kernel-macros
kernel-devel
kernel-default-man
bpftool
kernel
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-headers
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel-64kb
kernel-64kb-debugsource
kernel-64kb-devel
kernel-obs-build
kernel-obs-build-debugsource

How to mitigate CVE-2026-80717

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 5.15.0-198.208, 7.0.0-42.42
linux-kvm (Ubuntu package) - update to 5.15.0-1109.114
linux-gcp (Ubuntu package) - addressed in versions 5.15.0-1118.128, 7.0.0-1016.18
linux-aws (Ubuntu package) - addressed in versions 5.15.0-1117.124, 7.0.0-1016.17
linux-azure (Ubuntu package) - update to 5.15.0-1123.132
linux-oracle (Ubuntu package) - addressed in versions 5.15.0-1114.120, 7.0.0-1015.16
linux-lowlatency (Ubuntu package) - update to 5.15.0-195.205
linux-gke (Ubuntu package) - update to 5.15.0-1113.119
linux-aws-5.15 (Ubuntu package) - update to 5.15.0-1117.124~20.04.1
linux-lowlatency-hwe-5.15 (Ubuntu package) - update to 5.15.0-195.205~20.04.1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-198.208~20.04.1
linux-fips (Ubuntu package) - update to 5.15.0-198.208+fips1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1123.132~20.04.1
linux-azure-fde-5.15 (Ubuntu package) - update to 5.15.0-1122.131~20.04.1
linux-gkeop (Ubuntu package) - update to 5.15.0-1100.108
linux-intel-iotg (Ubuntu package) - update to 5.15.0-1112.118
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-realtime (Ubuntu package) - update to 5.15.0-1116.125
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1070.72, 6.8.0-1038.42
linux-nvidia (Ubuntu package) - update to 5.15.0-1112.113
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1111.115~20.04.1
linux-ibm (Ubuntu package) - addressed in versions 5.15.0-1111.115, 7.0.0-1017.17
linux-intel-iotg-5.15 (Ubuntu package) - update to 5.15.0-1112.118~20.04.1
linux-oracle-5.15 (Ubuntu package) - update to 5.15.0-1114.120~20.04.1
linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1118.128~20.04.1
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux-xilinx-zynqmp (Ubuntu package) - update to 5.15.0-1080.84
linux-intel-iot-realtime (Ubuntu package) - update to 5.15.0-1109.111
linux-gcp-fips (Ubuntu package) - update to 5.15.0-1118.128+fips1
linux-aws-fips (Ubuntu package) - update to 5.15.0-1117.124+fips1
linux-azure-fips (Ubuntu package) - update to 5.15.0-1123.132+fips1
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
kgraft-patch-4_12_14-122_339-default - update to 1-8.3.1
dlm-kmp-default - update to 4.12.14-122.339.1
kernel-default - addressed in versions 4.12.14-122.339.1, 6.4.0-159998.55.1
kernel-default-debuginfo - update to 4.12.14-122.339.1
kernel-default-debugsource - addressed in versions 4.12.14-122.339.1, 6.4.0-159998.55.1
kernel-default-kgraft - update to 4.12.14-122.339.1
kernel-default-kgraft-devel - update to 4.12.14-122.339.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.339.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.339.1
kernel-syms - addressed in versions 4.12.14-122.339.1, 6.4.0-159998.55.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.339.1
kernel-default-devel - addressed in versions 4.12.14-122.339.1, 6.4.0-159998.55.1
kernel-default-base-debuginfo - update to 4.12.14-122.339.1
kernel-default-base - update to 4.12.14-122.339.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.339.1
ocfs2-kmp-default - update to 4.12.14-122.339.1
gfs2-kmp-default - update to 4.12.14-122.339.1
cluster-md-kmp-default - update to 4.12.14-122.339.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.339.1, 6.4.0-159998.55.1
kernel-source - update to 4.12.14-122.339.1
kernel-macros - update to 4.12.14-122.339.1
kernel-devel - update to 4.12.14-122.339.1
kernel-default-man - update to 4.12.14-122.339.1
bpftool - update to 5.10.0-334.0.0.235
kernel - update to 5.10.0-334.0.0.235
bpftool-debuginfo - update to 5.10.0-334.0.0.235
kernel-debuginfo - update to 5.10.0-334.0.0.235
kernel-debugsource - update to 5.10.0-334.0.0.235
kernel-devel - update to 5.10.0-334.0.0.235
kernel-headers - update to 5.10.0-334.0.0.235
kernel-source - update to 5.10.0-334.0.0.235
kernel-tools - update to 5.10.0-334.0.0.235
kernel-tools-debuginfo - update to 5.10.0-334.0.0.235
kernel-tools-devel - update to 5.10.0-334.0.0.235
perf - update to 5.10.0-334.0.0.235
perf-debuginfo - update to 5.10.0-334.0.0.235
python3-perf - update to 5.10.0-334.0.0.235
python3-perf-debuginfo - update to 5.10.0-334.0.0.235
kernel-64kb - update to 6.4.0-159998.55.1
kernel-64kb-debugsource - update to 6.4.0-159998.55.1
kernel-64kb-devel - update to 6.4.0-159998.55.1
kernel-obs-build - update to 6.4.0-159998.55.1
kernel-obs-build-debugsource - update to 6.4.0-159998.55.1

External References

Related Security Bulletins