Use-after-free in Linux kernel - CVE-2023-53338

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Main Vulnerability Database Vulnerabilities #VU115779

Use-after-free in Linux kernel - CVE-2023-53338

Published: September 18, 2025 / Updated: September 22, 2025


Vulnerability identifier: #VU115779
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-53338
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free error within the run_lwt_bpf() and bpf_lwt_xmit_reroute() functions in net/core/lwt_bpf.c. A local user can escalate privileges on the system.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Live Patching
Development Tools Module
SUSE Real Time Module
Public Cloud Module
Legacy Module
Basesystem Module
openSUSE Leap
kgraft-patch-4_12_14-122_280-default
kernel-livepatch-6_4_0-150600_10_55-rt
kernel-livepatch-6_4_0-150600_10_55-rt-debuginfo
kernel-livepatch-SLE15-SP6-RT_Update_16-debugsource
kernel-livepatch-6_4_0-150600_23_73-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_16-debugsource
kernel-livepatch-6_4_0-150600_23_73-default
kernel-livepatch-6_4_0-150700_7_22-rt-debuginfo
kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource
kernel-livepatch-6_4_0-150700_7_22-rt
kernel-livepatch-6_4_0-150700_53_22-default-debuginfo
kernel-livepatch-6_4_0-150700_53_22-default
kernel-livepatch-SLE15-SP7_Update_6-debugsource
kernel-default-kgraft-devel
gfs2-kmp-default-debuginfo
kernel-syms
kernel-default-base
gfs2-kmp-default
kernel-default-debugsource
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-kgraft
kernel-default-devel-debuginfo
kernel-default-man
kernel-macros
kernel-devel
kernel-source
kernel-default
kernel-default-debuginfo
ocfs2-kmp-default
kernel-default-devel
cluster-md-kmp-default
dlm-kmp-default
cluster-md-kmp-default-debuginfo
kernel-default-base-debuginfo
dlm-kmp-azure
cluster-md-kmp-azure-debuginfo
kernel-azure-extra
dlm-kmp-azure-debuginfo
kernel-azure-optional
kernel-azure-debugsource
kernel-azure-optional-debuginfo
kselftests-kmp-azure
kernel-azure-extra-debuginfo
gfs2-kmp-azure-debuginfo
ocfs2-kmp-azure-debuginfo
kernel-devel-azure
kernel-source-azure
cluster-md-kmp-azure
kernel-azure-devel
kernel-azure-debuginfo
reiserfs-kmp-azure-debuginfo
ocfs2-kmp-azure
kselftests-kmp-azure-debuginfo
kernel-syms-azure
gfs2-kmp-azure
kernel-azure-devel-debuginfo
reiserfs-kmp-azure
kernel-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-rt-vdso
kernel-rt_debug-devel-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-rt_debug
kernel-rt-optional-debuginfo
kselftests-kmp-rt
reiserfs-kmp-rt
kernel-rt-extra
kernel-rt-devel-debuginfo
kernel-rt-vdso-debuginfo
kernel-rt-optional
reiserfs-kmp-rt-debuginfo
kernel-rt-livepatch-devel
kernel-rt-extra-debuginfo
kernel-rt_debug-vdso-debuginfo
kernel-rt_debug-vdso
kselftests-kmp-rt-debuginfo
kernel-rt_debug-debugsource
kernel-rt_debug-devel
dlm-kmp-rt-debuginfo
kernel-rt_debug-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
ocfs2-kmp-rt-debuginfo
kernel-rt-debugsource
ocfs2-kmp-rt
cluster-md-kmp-rt
dlm-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt-devel
kernel-debug-vdso
kernel-debug-debugsource
kernel-kvmsmall-vdso
kernel-obs-build-debugsource
kernel-64kb-devel-debuginfo
kernel-obs-build
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-debug-devel-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-docs-html
kernel-source-vanilla
kernel-debug
kernel-debug-debuginfo
kernel-debug-devel
gfs2-kmp-64kb
dtb-apple
dtb-xilinx
dtb-cavium
dtb-sprd
dlm-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-64kb-devel
dtb-lg
reiserfs-kmp-64kb-debuginfo
dtb-renesas
dlm-kmp-64kb
dtb-amazon
dtb-hisilicon
dtb-qcom
dtb-rockchip
dtb-broadcom
kernel-docs
dtb-nvidia
kernel-64kb-optional
dtb-altera
dtb-amd
reiserfs-kmp-64kb
dtb-socionext
ocfs2-kmp-64kb-debuginfo
dtb-allwinner
kernel-64kb-debugsource
cluster-md-kmp-64kb-debuginfo
dtb-mediatek
kernel-64kb-extra-debuginfo
dtb-freescale
kernel-64kb-optional-debuginfo
kernel-64kb-debuginfo
dtb-marvell
kernel-64kb-extra
kselftests-kmp-64kb
kernel-64kb
dtb-arm
kselftests-kmp-64kb-debuginfo
dtb-amlogic
dtb-aarch64
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-kvmsmall
kernel-obs-qa
dtb-exynos
kselftests-kmp-default
kernel-default-optional-debuginfo
kselftests-kmp-default-debuginfo
kernel-default-optional
kernel-kvmsmall-devel
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-debug-vdso-debuginfo
kernel-default-vdso
kernel-default-vdso-debuginfo
kernel-kvmsmall-vdso-debuginfo
gfs2-kmp-64kb-debuginfo
ocfs2-kmp-64kb
dtb-apm
kernel-default-base-rebuild

How to mitigate CVE-2023-53338

Install update from vendor's repository.

Linux kernel - update to 5.15.132
kgraft-patch-4_12_14-122_280-default - update to 1-8.5.1
kernel-livepatch-6_4_0-150600_10_55-rt - update to 1-150600.1.3.1
kernel-livepatch-6_4_0-150600_10_55-rt-debuginfo - update to 1-150600.1.3.1
kernel-livepatch-SLE15-SP6-RT_Update_16-debugsource - update to 1-150600.1.3.1
kernel-livepatch-6_4_0-150600_23_73-default-debuginfo - update to 1-150600.13.3.1
kernel-livepatch-SLE15-SP6_Update_16-debugsource - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150600_23_73-default - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150700_7_22-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_22-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_22-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_22-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_6-debugsource - update to 1-150700.15.3.1
kernel-default-kgraft-devel - update to 4.12.14-122.280.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-syms - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-base - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1.150600.12.32.1, 6.4.0-150700.53.22.1.150700.17.15.1
gfs2-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-debugsource - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-kgraft - update to 4.12.14-122.280.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-man - update to 4.12.14-122.280.1
kernel-macros - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-devel - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-source - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-devel - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
dlm-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-base-debuginfo - update to 4.12.14-122.280.1
dlm-kmp-azure - update to 6.4.0-150600.8.52.1
cluster-md-kmp-azure-debuginfo - update to 6.4.0-150600.8.52.1
kernel-azure-extra - update to 6.4.0-150600.8.52.1
dlm-kmp-azure-debuginfo - update to 6.4.0-150600.8.52.1
kernel-azure-optional - update to 6.4.0-150600.8.52.1
kernel-azure-debugsource - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
kernel-azure-optional-debuginfo - update to 6.4.0-150600.8.52.1
kselftests-kmp-azure - update to 6.4.0-150600.8.52.1
kernel-azure-extra-debuginfo - update to 6.4.0-150600.8.52.1
gfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.52.1
ocfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.52.1
kernel-devel-azure - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
kernel-source-azure - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
cluster-md-kmp-azure - update to 6.4.0-150600.8.52.1
kernel-azure-devel - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
kernel-azure-debuginfo - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
reiserfs-kmp-azure-debuginfo - update to 6.4.0-150600.8.52.1
ocfs2-kmp-azure - update to 6.4.0-150600.8.52.1
kselftests-kmp-azure-debuginfo - update to 6.4.0-150600.8.52.1
kernel-syms-azure - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
gfs2-kmp-azure - update to 6.4.0-150600.8.52.1
kernel-azure-devel-debuginfo - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
reiserfs-kmp-azure - update to 6.4.0-150600.8.52.1
kernel-azure - addressed in versions 6.4.0-150600.8.52.1, 6.4.0-150700.20.18.1
kernel-azure-vdso - update to 6.4.0-150600.8.52.1
kernel-azure-vdso-debuginfo - update to 6.4.0-150600.8.52.1
kernel-rt-vdso - update to 6.4.0-150600.10.55.1
kernel-rt_debug-devel-debuginfo - update to 6.4.0-150600.10.55.1
kernel-devel-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-source-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-rt_debug - update to 6.4.0-150600.10.55.1
kernel-rt-optional-debuginfo - update to 6.4.0-150600.10.55.1
kselftests-kmp-rt - update to 6.4.0-150600.10.55.1
reiserfs-kmp-rt - update to 6.4.0-150600.10.55.1
kernel-rt-extra - update to 6.4.0-150600.10.55.1
kernel-rt-devel-debuginfo - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-rt-vdso-debuginfo - update to 6.4.0-150600.10.55.1
kernel-rt-optional - update to 6.4.0-150600.10.55.1
reiserfs-kmp-rt-debuginfo - update to 6.4.0-150600.10.55.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.55.1
kernel-rt-extra-debuginfo - update to 6.4.0-150600.10.55.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.55.1
kernel-rt_debug-vdso - update to 6.4.0-150600.10.55.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.55.1
kernel-rt_debug-debugsource - update to 6.4.0-150600.10.55.1
kernel-rt_debug-devel - update to 6.4.0-150600.10.55.1
dlm-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-rt_debug-debuginfo - update to 6.4.0-150600.10.55.1
kernel-rt-debuginfo - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
gfs2-kmp-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
cluster-md-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-syms-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
ocfs2-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-rt-debugsource - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
ocfs2-kmp-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
cluster-md-kmp-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
dlm-kmp-rt - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
gfs2-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-rt-devel - addressed in versions 6.4.0-150600.10.55.1, 6.4.0-150700.7.22.1
kernel-debug-vdso - update to 6.4.0-150600.23.73.1
kernel-debug-debugsource - update to 6.4.0-150600.23.73.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.73.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-obs-build - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.73.1
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-docs-html - update to 6.4.0-150600.23.73.1
kernel-source-vanilla - update to 6.4.0-150600.23.73.1
kernel-debug - update to 6.4.0-150600.23.73.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.73.1
kernel-debug-devel - update to 6.4.0-150600.23.73.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.73.1
dtb-apple - update to 6.4.0-150600.23.73.1
dtb-xilinx - update to 6.4.0-150600.23.73.1
dtb-cavium - update to 6.4.0-150600.23.73.1
dtb-sprd - update to 6.4.0-150600.23.73.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.73.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.73.1
kernel-64kb-devel - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
dtb-lg - update to 6.4.0-150600.23.73.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.73.1
dtb-renesas - update to 6.4.0-150600.23.73.1
dlm-kmp-64kb - update to 6.4.0-150600.23.73.1
dtb-amazon - update to 6.4.0-150600.23.73.1
dtb-hisilicon - update to 6.4.0-150600.23.73.1
dtb-qcom - update to 6.4.0-150600.23.73.1
dtb-rockchip - update to 6.4.0-150600.23.73.1
dtb-broadcom - update to 6.4.0-150600.23.73.1
kernel-docs - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
dtb-nvidia - update to 6.4.0-150600.23.73.1
kernel-64kb-optional - update to 6.4.0-150600.23.73.1
dtb-altera - update to 6.4.0-150600.23.73.1
dtb-amd - update to 6.4.0-150600.23.73.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.73.1
dtb-socionext - update to 6.4.0-150600.23.73.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.73.1
dtb-allwinner - update to 6.4.0-150600.23.73.1
kernel-64kb-debugsource - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.73.1
dtb-mediatek - update to 6.4.0-150600.23.73.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.73.1
dtb-freescale - update to 6.4.0-150600.23.73.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.73.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
dtb-marvell - update to 6.4.0-150600.23.73.1
kernel-64kb-extra - update to 6.4.0-150600.23.73.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.73.1
kernel-64kb - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
dtb-arm - update to 6.4.0-150600.23.73.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.73.1
dtb-amlogic - update to 6.4.0-150600.23.73.1
dtb-aarch64 - update to 6.4.0-150600.23.73.1
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.73.1, 6.4.0-150700.53.22.1
kernel-kvmsmall - update to 6.4.0-150600.23.73.1
kernel-obs-qa - update to 6.4.0-150600.23.73.1
dtb-exynos - update to 6.4.0-150600.23.73.1
kselftests-kmp-default - update to 6.4.0-150600.23.73.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.73.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.73.1
kernel-default-optional - update to 6.4.0-150600.23.73.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.73.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.73.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.73.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.73.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.73.1
kernel-default-vdso - update to 6.4.0-150600.23.73.1
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.73.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.73.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.73.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.73.1
dtb-apm - update to 6.4.0-150600.23.73.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.73.1.150600.12.32.1

External References

Related Security Bulletins