ID:12905 - Exploit for Use-after-free in Linux kernel - CVE-2026-23111

Vulnerability identifier: #VU122832

Vulnerability risk: Low

CVE-ID: CVE-2026-23111

CWE-ID: CWE-416

Exploitation vector: Local access

Vulnerable software:
Linux kernel
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
SUSE Linux Enterprise Live Patching
Basesystem Module
Public Cloud Module
Legacy Module
Development Tools Module
SUSE Real Time Module
openSUSE Leap
Ubuntu
openEuler
kernel-livepatch-6_4_0-150600_23_92-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_21-debugsource
kernel-livepatch-6_4_0-150600_23_92-default
kernel-livepatch-SLE15-SP7-RT_Update_10-debugsource
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kernel (Red Hat package)
linux-aws-fips (Ubuntu package)
linux (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
kernel-livepatch-6_4_0-150600_23_73-default
kernel-livepatch-6_4_0-150600_23_73-default-debuginfo
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kernel-livepatch-6_4_0-150700_7_19-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_19-rt
linux (Debian package)
kselftests-kmp-default
dtb-sprd
dtb-amd
dtb-amazon
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-kvmsmall
kernel-default
dtb-rockchip
gfs2-kmp-default
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ocfs2-kmp-default-debuginfo
kernel-default-extra-debuginfo
ocfs2-kmp-default
reiserfs-kmp-default
kernel-obs-qa
kselftests-kmp-default-debuginfo
dtb-amlogic
kernel-64kb-debugsource
dtb-hisilicon
kernel-64kb-devel
dtb-renesas
kernel-64kb-debuginfo
dtb-arm
kernel-64kb-optional
dtb-apm
reiserfs-kmp-64kb-debuginfo
kernel-default-optional
dtb-cavium
dtb-mediatek
reiserfs-kmp-64kb
kselftests-kmp-64kb
gfs2-kmp-64kb
dtb-apple
dlm-kmp-64kb-debuginfo
dtb-socionext
kernel-debug-debuginfo
kernel-debug-vdso
kernel-kvmsmall-vdso
kernel-debug-vdso-debuginfo
kernel-default-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-default-vdso-debuginfo
kernel-debug-devel
kernel-debug-debugsource
kernel-debug-devel-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-debug
kernel-devel
kernel-macros
kernel-source
kernel-source-vanilla
kernel-docs-html
kernel-docs
kernel-default-livepatch-devel
cluster-md-kmp-default-debuginfo
dlm-kmp-default
kernel-syms
kernel-default-debugsource
kernel-default-devel-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-devel
dlm-kmp-default-debuginfo
cluster-md-kmp-default
kernel-obs-build-debugsource
gfs2-kmp-64kb-debuginfo
kernel-default-debuginfo
kernel-obs-build
kernel-default-livepatch
kernel-default-extra
gfs2-kmp-default-debuginfo
kernel-kvmsmall-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
ocfs2-kmp-64kb
kselftests-kmp-64kb-debuginfo
dtb-freescale
dtb-qcom
cluster-md-kmp-64kb-debuginfo
dtb-exynos
dtb-broadcom
dtb-altera
dtb-marvell
kernel-64kb-optional-debuginfo
kernel-64kb-extra
dtb-nvidia
dlm-kmp-64kb
ocfs2-kmp-64kb-debuginfo
dtb-lg
dtb-allwinner
dtb-xilinx
kernel-64kb
cluster-md-kmp-64kb
kernel-64kb-extra-debuginfo
kernel-64kb-devel-debuginfo
kernel-default-base
kernel-default-base-rebuild
kernel-rt
kernel-rt-debuginfo
gfs2-kmp-rt
kernel-syms-rt
ocfs2-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-rt-debugsource
dlm-kmp-rt-debuginfo
dlm-kmp-rt
cluster-md-kmp-rt-debuginfo
kernel-devel-rt
ocfs2-kmp-rt
kernel-source-rt
kernel-azure-devel-debuginfo
kernel-azure
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel
kernel-debugsource
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-headers
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel-extra-modules
linux-aws-6.8 (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-xilinx (Ubuntu package)
linux-oracle (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
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kernel-livepatch-6_4_0-150600_23_70-default
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kernel-livepatch-SLE15-SP7_Update_0-debugsource
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kernel-livepatch-6_4_0-150600_23_50-default
kernel-livepatch-6_4_0-150600_23_50-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_12-debugsource
kernel-livepatch-6_4_0-150600_23_53-default-debuginfo
kernel-livepatch-6_4_0-150600_23_53-default
kernel-livepatch-SLE15-SP6_Update_11-debugsource
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kernel-livepatch-SLE15-SP6_Update_10-debugsource
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kernel-livepatch-SLE15-SP6_Update_9-debugsource

https://github.com/Knz-source/CVE-2026-23111-POC-noddlenpottato

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the nft_map_catchall_activate() function in net/netfilter/nf_tables_api.c. A local user can escalate privileges on the system.

Install update from vendor's repository.