Improper input validation in Linux kernel - CVE-2026-64106

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU138538

Improper input validation in Linux kernel - CVE-2026-64106

Published: July 20, 2026


Vulnerability identifier: #VU138538
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64106
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to improper input validation in vgic_its_restore_dte() when restoring an ITS Device Table Entry. A remote user can supply a restored DTE with an out-of-range Size field to cause a denial of service.

Exploitation requires the ability to restore crafted KVM ITS device state on arm64 systems.


Affected software

Linux kernel
openEuler
Ubuntu
kernel-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
bpftool-debuginfo
bpftool
kernel
perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel-extra-modules
linux (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle-7.0 (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

How to mitigate CVE-2026-64106

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-debuginfo - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
perf - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-tools-devel - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-tools-debuginfo - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-tools - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-source - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-headers - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-devel - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-debugsource - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
bpftool-debuginfo - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
bpftool - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
perf-debuginfo - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
python3-perf - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
python3-perf-debuginfo - addressed in versions 5.10.0-326.0.0.227, 6.6.0-145.3.29.160
kernel-extra-modules - update to 6.6.0-145.3.29.160
linux (Ubuntu package) - addressed in versions 6.8.0-139.139+fips1, 6.8.0-1049.53, 6.8.0-1062.65+fips1, 6.8.0-1062.65.1, 6.8.0-1062.65~22.04.1, 6.8.0-1062.70, 6.8.0-1064.68, 6.8.0-1067.75, 6.8.0-1067.75+fips1, 6.8.1-1059.60, 6.8.1-1059.60~22.04.1
linux-lowlatency (Ubuntu package) - addressed in versions 6.8.0-139.139.1, 6.8.0-139.139.1~22.04.1
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
linux-gcp-6.8 (Ubuntu package) - addressed in versions 6.8.0-1036.37, 6.8.0-1064.65, 6.8.0-1067.75~22.04.1
linux-oracle (Ubuntu package) - addressed in versions 6.8.0-1061.64, 6.8.0-1061.64~22.04.1
linux-aws-fips (Ubuntu package) - update to 6.8.0-1064.67+fips1
linux-aws (Ubuntu package) - addressed in versions 6.8.0-1064.67~22.04.1, 7.0.0-1009.9, 7.0.0-1015.15
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1067.75, 7.0.0-1009.9, 7.0.0-1010.10
linux-azure-fips (Ubuntu package) - update to 6.8.0-1067.75+fips1
linux-azure-6.8 (Ubuntu package) - update to 6.8.0-1067.75~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2053.55
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-azure-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1
linux-nvidia (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

External References

Related Security Bulletins