Use-after-free in Linux kernel - CVE-2026-46004

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Main Vulnerability Database Vulnerabilities #VU132481

Use-after-free in Linux kernel - CVE-2026-46004

Published: May 28, 2026


Vulnerability identifier: #VU132481
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-2026-46004
CWE-ID: CWE-416
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 a use-after-free in the caiaq driver setup_card() error handling when probing the device. A local user can trigger a probe error to cause a denial of service.

The issue occurs because execution continues after freeing the sound card during certain error paths.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Live Patching
openSUSE Leap
Ubuntu
openEuler
kernel-livepatch-6_4_0-150600_23_115-default
kernel-livepatch-6_4_0-150600_23_115-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_27-debugsource
kernel-headers
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-raspi (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-fde (Ubuntu package)
kernel-default-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-debug-vdso-debuginfo
kernel-debug-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-default-vdso
kernel-default-livepatch-devel
dtb-allwinner
kernel-kvmsmall
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
reiserfs-kmp-64kb
dtb-amazon
kernel-64kb-optional
reiserfs-kmp-64kb-debuginfo
dtb-xilinx
dtb-apple
dtb-mediatek
ocfs2-kmp-64kb-debuginfo
dtb-amlogic
cluster-md-kmp-64kb
dtb-socionext
dtb-broadcom
kernel-64kb-extra
kernel-64kb-debuginfo
dtb-altera
kselftests-kmp-64kb
dtb-arm
kernel-debug-devel-debuginfo
dtb-nvidia
kernel-64kb
kernel-kvmsmall-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
dtb-lg
dtb-apm
dlm-kmp-64kb
gfs2-kmp-64kb-debuginfo
dtb-rockchip
dtb-freescale
dlm-kmp-64kb-debuginfo
dtb-hisilicon
dtb-cavium
kernel-64kb-devel-debuginfo
kernel-64kb-debugsource
dtb-qcom
dtb-sprd
cluster-md-kmp-64kb-debuginfo
gfs2-kmp-64kb
ocfs2-kmp-64kb
dtb-marvell
dtb-renesas
dtb-exynos
kernel-64kb-devel
kselftests-kmp-64kb-debuginfo
dtb-amd
kernel-64kb-extra-debuginfo
kernel-64kb-optional-debuginfo
kernel-default
kernel-default-optional
kernel-syms
kernel-default-debuginfo
cluster-md-kmp-default
kernel-default-devel-debuginfo
reiserfs-kmp-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default-debuginfo
reiserfs-kmp-default
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default
kernel-docs
kernel-macros
kernel-docs-html
kernel-source-vanilla
kernel-debug
kernel-debug-debugsource
kernel-debug-devel
kernel-debug-debuginfo
kernel-default-livepatch
kselftests-kmp-default
kernel-default-debugsource
kernel-obs-build-debugsource
kernel-obs-build
kernel-obs-qa
kernel-default-devel
kernel-default-extra-debuginfo
kernel-default-extra
gfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
kselftests-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-optional-debuginfo
kernel-default-base
kernel-default-base-rebuild
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-azure-fde-6.8 (Ubuntu package)
linux-gcp-fips (Ubuntu package)

How to mitigate CVE-2026-46004

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-livepatch-6_4_0-150600_23_115-default - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150600_23_115-default-debuginfo - update to 1-150600.13.3.1
kernel-livepatch-SLE15-SP6_Update_27-debugsource - update to 1-150600.13.3.1
kernel-headers - update to 5.10.0-334.0.0.235
kernel - update to 5.10.0-334.0.0.235
bpftool - 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-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
linux (Ubuntu package) - addressed in versions 5.15.0.184.155, 5.15.0-184.194, 5.15.0-184.194~20.04.1, 5.15.0.186.166, 5.15.0-186.196, 5.15.0-186.196~20.04.1, 5.15.0.1075.78, 5.15.0-1075.79, 5.15.0.1095.94, 5.15.0-1095.103, 5.15.0.1104.100, 5.15.0-1104.109, 5.15.0.1108.107, 5.15.0-1108.114, 5.15.0.1111.115, 5.15.0-1111.120+fips1, 5.15.0.1112.102, 5.15.0.1112.109, 5.15.0-1112.122, 5.15.0-1112.122+fips1, 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, 7.0.0-27.27
linux-aws (Ubuntu package) - addressed in versions 5.15.0.186.109, 5.15.0-186.196+fips1, 5.15.0.1106.103, 5.15.0-1106.110, 5.15.0.1107.107, 5.15.0-1107.108, 5.15.0.1112.108, 5.15.0.1112.115, 5.15.0-1112.119, 5.15.0-1112.119+fips1, 5.15.0-1112.119~20.04.1, 6.8.0-1061.64+1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1053.53, 5.15.0.1053.55, 5.15.0.1064.64, 5.15.0-1064.66
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1064.66~20.04.1
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1104.106, 5.15.0.1104.108, 5.15.0-1107.113~20.04.1
linux-raspi (Ubuntu package) - addressed in versions 5.15.0.1106.104, 5.15.0-1106.109, 6.8.0-1061.65, 6.8.0-2050.52, 7.0.0-1014.14
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1106.110~20.04.1
linux-intel-iotg (Ubuntu package) - addressed in versions 5.15.0.1107.106, 5.15.0-1107.113
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1109.105, 5.15.0-1109.115, 5.15.0.1117.115, 5.15.0-1117.126, 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-5.15 (Ubuntu package) - addressed in versions 5.15.0-1109.115~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2
linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1112.122~20.04.1
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1117.102, 5.15.0-1117.126+fips1, 6.8.0-1063.71+fips2
linux-azure-fde (Ubuntu package) - addressed in versions 5.15.0-1117.126, 6.8.0-1062.69
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.115.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.115.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.115.1
kernel-debug-vdso - update to 6.4.0-150600.23.115.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.115.1
kernel-default-vdso - update to 6.4.0-150600.23.115.1
kernel-default-livepatch-devel - update to 6.4.0-150600.23.115.1
dtb-allwinner - update to 6.4.0-150600.23.115.1
kernel-kvmsmall - update to 6.4.0-150600.23.115.1
kernel-zfcpdump - update to 6.4.0-150600.23.115.1
kernel-zfcpdump-debugsource - update to 6.4.0-150600.23.115.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150600.23.115.1
dtb-aarch64 - update to 6.4.0-150600.23.115.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.115.1
dtb-amazon - update to 6.4.0-150600.23.115.1
kernel-64kb-optional - update to 6.4.0-150600.23.115.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.115.1
dtb-xilinx - update to 6.4.0-150600.23.115.1
dtb-apple - update to 6.4.0-150600.23.115.1
dtb-mediatek - update to 6.4.0-150600.23.115.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.115.1
dtb-amlogic - update to 6.4.0-150600.23.115.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.115.1
dtb-socionext - update to 6.4.0-150600.23.115.1
dtb-broadcom - update to 6.4.0-150600.23.115.1
kernel-64kb-extra - update to 6.4.0-150600.23.115.1
kernel-64kb-debuginfo - update to 6.4.0-150600.23.115.1
dtb-altera - update to 6.4.0-150600.23.115.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.115.1
dtb-arm - update to 6.4.0-150600.23.115.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.115.1
dtb-nvidia - update to 6.4.0-150600.23.115.1
kernel-64kb - update to 6.4.0-150600.23.115.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.115.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.115.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.115.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.115.1
dtb-lg - update to 6.4.0-150600.23.115.1
dtb-apm - update to 6.4.0-150600.23.115.1
dlm-kmp-64kb - update to 6.4.0-150600.23.115.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.115.1
dtb-rockchip - update to 6.4.0-150600.23.115.1
dtb-freescale - update to 6.4.0-150600.23.115.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.115.1
dtb-hisilicon - update to 6.4.0-150600.23.115.1
dtb-cavium - update to 6.4.0-150600.23.115.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150600.23.115.1
kernel-64kb-debugsource - update to 6.4.0-150600.23.115.1
dtb-qcom - update to 6.4.0-150600.23.115.1
dtb-sprd - update to 6.4.0-150600.23.115.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.115.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.115.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.115.1
dtb-marvell - update to 6.4.0-150600.23.115.1
dtb-renesas - update to 6.4.0-150600.23.115.1
dtb-exynos - update to 6.4.0-150600.23.115.1
kernel-64kb-devel - update to 6.4.0-150600.23.115.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.115.1
dtb-amd - update to 6.4.0-150600.23.115.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.115.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.115.1
kernel-default - update to 6.4.0-150600.23.115.1
kernel-default-optional - update to 6.4.0-150600.23.115.1
kernel-syms - update to 6.4.0-150600.23.115.1
kernel-default-debuginfo - update to 6.4.0-150600.23.115.1
cluster-md-kmp-default - update to 6.4.0-150600.23.115.1
kernel-default-devel-debuginfo - update to 6.4.0-150600.23.115.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150600.23.115.1
dlm-kmp-default - update to 6.4.0-150600.23.115.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150600.23.115.1
reiserfs-kmp-default - update to 6.4.0-150600.23.115.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150600.23.115.1
ocfs2-kmp-default - update to 6.4.0-150600.23.115.1
kernel-docs - update to 6.4.0-150600.23.115.1
kernel-macros - update to 6.4.0-150600.23.115.1
kernel-docs-html - update to 6.4.0-150600.23.115.1
kernel-devel - update to 6.4.0-150600.23.115.1
kernel-source - update to 6.4.0-150600.23.115.1
kernel-source-vanilla - update to 6.4.0-150600.23.115.1
kernel-debug - update to 6.4.0-150600.23.115.1
kernel-debug-debugsource - update to 6.4.0-150600.23.115.1
kernel-debug-devel - update to 6.4.0-150600.23.115.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.115.1
kernel-default-livepatch - update to 6.4.0-150600.23.115.1
kselftests-kmp-default - update to 6.4.0-150600.23.115.1
kernel-default-debugsource - update to 6.4.0-150600.23.115.1
kernel-obs-build-debugsource - update to 6.4.0-150600.23.115.1
kernel-obs-build - update to 6.4.0-150600.23.115.1
kernel-obs-qa - update to 6.4.0-150600.23.115.1
kernel-default-devel - update to 6.4.0-150600.23.115.1
kernel-default-extra-debuginfo - update to 6.4.0-150600.23.115.1
kernel-default-extra - update to 6.4.0-150600.23.115.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150600.23.115.1
dlm-kmp-default-debuginfo - update to 6.4.0-150600.23.115.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.115.1
gfs2-kmp-default - update to 6.4.0-150600.23.115.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.115.1
kernel-default-base - update to 6.4.0-150600.23.115.1.150600.12.54.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.115.1.150600.12.54.1
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
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, 7.0.0-1013.13
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1061.64+fips1, 6.8.0-1061.64~22.04.1
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1062.69~22.04.1
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1064.72+fips1

External References

Related Security Bulletins