Improper input validation in Linux kernel - CVE-2026-46117

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Main Vulnerability Database Vulnerabilities #VU133071

Improper input validation in Linux kernel - CVE-2026-46117

Published: May 29, 2026


Vulnerability identifier: #VU133071
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-46117
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to corrupt kernel memory.

The vulnerability exists due to improper input validation in mana_ib_create_qp_rss() when processing user-supplied work queue configurations through the RDMA uAPI. A local user can specify work queues sharing the same completion queue to corrupt kernel memory.


Affected software

Linux kernel
Debian Linux
Anolis OS
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Ubuntu
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-tools-libs
kernel-devel
kernel-debug-modules-extra
bpftool
kernel
kernel-core
kernel-headers
kernel-modules
kernel-cross-headers
kernel-debug
kernel-modules-extra
kernel-tools
kernel-tools-libs-devel
kernel-debug-core
perf
python3-perf
kernel-debug-devel
kernel-abi-stablelists
kernel-doc
kernel-debug-modules
linux (Ubuntu package)
linux-fips (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux (Debian package)
linux-oem-7.0 (Ubuntu package)

How to mitigate CVE-2026-46117

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel (Red Hat package) - addressed in versions 4.18.0-553.146.1.el8_10, 5.14.0-687.17.1.el9_8, 6.12.0-211.28.1.el10_2
kernel-rt (Red Hat package) - update to 4.18.0-553.146.1.rt7.487.el8_10
kernel-tools-libs - update to 4.18.0-553.146.1.0.1
kernel-devel - update to 4.18.0-553.146.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.146.1.0.1
bpftool - update to 4.18.0-553.146.1.0.1
kernel - update to 4.18.0-553.146.1.0.1
kernel-core - update to 4.18.0-553.146.1.0.1
kernel-headers - update to 4.18.0-553.146.1.0.1
kernel-modules - update to 4.18.0-553.146.1.0.1
kernel-cross-headers - update to 4.18.0-553.146.1.0.1
kernel-debug - update to 4.18.0-553.146.1.0.1
kernel-modules-extra - update to 4.18.0-553.146.1.0.1
kernel-tools - update to 4.18.0-553.146.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.146.1.0.1
kernel-debug-core - update to 4.18.0-553.146.1.0.1
perf - update to 4.18.0-553.146.1.0.1
python3-perf - update to 4.18.0-553.146.1.0.1
kernel-debug-devel - update to 4.18.0-553.146.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.146.1.0.1
kernel-doc - update to 4.18.0-553.146.1.0.1
kernel-debug-modules - update to 4.18.0-553.146.1.0.1
linux (Ubuntu package) - addressed in versions 6.8.0-136.136, 6.8.0-1046.50, 6.8.0-1059.67, 6.8.0-1064.72, 6.8.0-1064.72~22.04.1, 6.8.1-1056.57, 6.8.1-1056.57~22.04.2, 7.0.0-28.28, 7.0.0-28.28.1, 7.0.0-1003.4, 7.0.0-1008.8
linux-fips (Ubuntu package) - addressed in versions 6.8.0-136.136+fips2, 6.8.0-136.136.2, 6.8.0-136.136.2~22.04.1, 6.8.0-1058.61
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-136.136~22.04.1
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1030.31, 6.8.0-1033.34, 6.8.0-1061.62, 6.8.0-1061.62~22.04.1, 7.0.0-1008.8, 7.0.0-1010.10
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1058.61~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1059.62, 6.8.0-1059.62.1, 6.8.0-1059.62~22.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1061.64+fips1, 6.8.0-1061.64~22.04.1
linux-aws (Ubuntu package) - addressed in versions 6.8.0-1061.64+1, 7.0.0-1009.9, 7.0.0-1015.15
linux-azure-fde (Ubuntu package) - update to 6.8.0-1062.69
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1062.69~22.04.1
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1063.71, 6.8.0-1063.71~22.04.1, 7.0.0-1009.9, 7.0.0-1010.10
linux-azure-fips (Ubuntu package) - update to 6.8.0-1063.71+fips2
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1064.72+fips1
linux (Debian package) - update to 6.12.94-1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9

External References

Related Security Bulletins