Memory leak in Linux kernel - CVE-2023-53241

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Main Vulnerability Database Vulnerabilities #VU115235

Memory leak in Linux kernel - CVE-2023-53241

Published: September 16, 2025 / Updated: September 22, 2025


Vulnerability identifier: #VU115235
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-2023-53241
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the nfsd4_encode_operation() function in fs/nfsd/nfs4xdr.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Manager Proxy 4.3
SUSE Manager Retail Branch Server 4.3
SUSE Linux Enterprise Server 15 SP4
SUSE Manager Server 4.3
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Live Patching
openSUSE Leap
openEuler
kernel-livepatch-5_14_21-150400_24_179-default
kernel-livepatch-5_14_21-150400_24_179-default-debuginfo
kernel-livepatch-SLE15-SP4_Update_45-debugsource
kernel-livepatch-SLE15-SP5_Update_31-debugsource
kernel-livepatch-5_14_21-150500_55_124-default-debuginfo
kernel-livepatch-5_14_21-150500_55_124-default
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
python3-perf-debuginfo
python3-perf
python2-perf-debuginfo
python2-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-headers
kernel-source-rt
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-rt
kernel-kvmsmall
kernel-default
dtb-arm
dtb-apm
kernel-64kb-debugsource
dtb-lg
dtb-freescale
ocfs2-kmp-64kb-debuginfo
kernel-docs
dtb-broadcom
kernel-default-livepatch-devel
dtb-cavium
gfs2-kmp-64kb-debuginfo
dtb-hisilicon
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
dtb-aarch64
dtb-sprd
ocfs2-kmp-64kb
reiserfs-kmp-64kb
kernel-64kb-debuginfo
dtb-socionext
kernel-64kb-optional-debuginfo
kernel-64kb-extra-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-extra
kernel-default-optional-debuginfo
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-extra-debuginfo
dlm-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-livepatch
gfs2-kmp-default-debuginfo
cluster-md-kmp-default
kernel-syms
kernel-default-optional
kernel-default-devel-debuginfo
kernel-obs-qa
ocfs2-kmp-default-debuginfo
dlm-kmp-default
kernel-default-devel
kernel-docs-html
kernel-source-vanilla
kernel-macros
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel
ocfs2-kmp-default
kselftests-kmp-default
cluster-md-kmp-default-debuginfo
kselftests-kmp-default-debuginfo
kernel-default-debuginfo
kernel-default-debugsource
reiserfs-kmp-default
cluster-md-kmp-64kb
dtb-exynos
kernel-64kb
dtb-rockchip
dlm-kmp-64kb
kernel-64kb-devel
kernel-64kb-devel-debuginfo
dtb-marvell
dtb-allwinner
reiserfs-kmp-64kb-debuginfo
cluster-md-kmp-64kb-debuginfo
dtb-xilinx
kernel-64kb-optional
dtb-qcom
dtb-apple
kselftests-kmp-64kb
dtb-amd
dlm-kmp-64kb-debuginfo
dtb-amazon
dtb-nvidia
dtb-mediatek
dtb-amlogic
dtb-renesas
kselftests-kmp-64kb-debuginfo
dtb-altera
kernel-64kb-extra
gfs2-kmp-64kb
kernel-default-base
kernel-default-base-rebuild
reiserfs-kmp-rt-debuginfo
gfs2-kmp-rt
kernel-rt-optional
kernel-rt_debug-debuginfo
kernel-rt-livepatch-devel
kernel-rt-devel
cluster-md-kmp-rt
kernel-rt-vdso-debuginfo
dlm-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-optional-debuginfo
kernel-rt-devel-debuginfo
kernel-rt_debug-vdso
kernel-rt_debug
kernel-syms-rt
kselftests-kmp-rt
reiserfs-kmp-rt
kernel-rt_debug-vdso-debuginfo
kernel-devel-rt
dlm-kmp-rt
kernel-rt_debug-devel-debuginfo
kernel-rt-extra-debuginfo
kernel-rt-livepatch
kernel-rt_debug-debugsource
ocfs2-kmp-rt
kernel-rt_debug-devel
kernel-rt-vdso
kernel-rt-extra
kselftests-kmp-rt-debuginfo
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-default-vdso-debuginfo
kernel-default-vdso

How to mitigate CVE-2023-53241

Install update from vendor's repository.

Linux kernel - update to 6.1.24
kernel-livepatch-5_14_21-150400_24_179-default - update to 1-150400.9.3.1
kernel-livepatch-5_14_21-150400_24_179-default-debuginfo - update to 1-150400.9.3.1
kernel-livepatch-SLE15-SP4_Update_45-debugsource - update to 1-150400.9.3.1
kernel-livepatch-SLE15-SP5_Update_31-debugsource - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_124-default-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_124-default - update to 1-150500.11.3.1
kernel-tools-debuginfo - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-tools - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-source - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-devel - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-debugsource - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-debuginfo - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
bpftool-debuginfo - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.187
bpftool - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.187
kernel - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
python3-perf-debuginfo - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
python3-perf - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
python2-perf-debuginfo - update to 4.19.90-2510.1.0.0346
python2-perf - update to 4.19.90-2510.1.0.0346
perf-debuginfo - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
perf - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-tools-devel - addressed in versions 4.19.90-2510.1.0.0346, 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-headers - addressed in versions 5.10.0-284.0.0.186, 5.10.0-284.0.0.187
kernel-source-rt - addressed in versions 5.14.21-150400.15.133.1, 5.14.21-150500.13.109.1
kernel-rt-debuginfo - addressed in versions 5.14.21-150400.15.133.1, 5.14.21-150500.13.109.1
kernel-rt-debugsource - addressed in versions 5.14.21-150400.15.133.1, 5.14.21-150500.13.109.1
kernel-rt - addressed in versions 5.14.21-150400.15.133.1, 5.14.21-150500.13.109.1
kernel-kvmsmall - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-arm - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-apm - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-debugsource - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-lg - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-freescale - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
ocfs2-kmp-64kb-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-docs - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-broadcom - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-livepatch-devel - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-cavium - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
gfs2-kmp-64kb-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-hisilicon - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-zfcpdump - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-zfcpdump-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-zfcpdump-debugsource - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-aarch64 - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-sprd - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
ocfs2-kmp-64kb - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
reiserfs-kmp-64kb - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-socionext - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-optional-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-extra-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-extra - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-optional-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-obs-build-debugsource - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-obs-build - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-extra-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dlm-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
gfs2-kmp-default - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-livepatch - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
gfs2-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
cluster-md-kmp-default - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-syms - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-optional - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-devel-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-obs-qa - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
ocfs2-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dlm-kmp-default - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-devel - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-docs-html - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-devel - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-source-vanilla - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-macros - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-kvmsmall-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-kvmsmall-devel-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-kvmsmall-debugsource - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-kvmsmall-devel - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-source - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
ocfs2-kmp-default - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kselftests-kmp-default - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
cluster-md-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kselftests-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-debugsource - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
reiserfs-kmp-default - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
cluster-md-kmp-64kb - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-exynos - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-rockchip - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dlm-kmp-64kb - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-devel - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-devel-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-marvell - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-allwinner - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
reiserfs-kmp-64kb-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
cluster-md-kmp-64kb-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-xilinx - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-optional - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-qcom - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-apple - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kselftests-kmp-64kb - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-amd - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dlm-kmp-64kb-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-amazon - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-nvidia - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-mediatek - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-amlogic - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-renesas - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kselftests-kmp-64kb-debuginfo - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
dtb-altera - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-64kb-extra - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
gfs2-kmp-64kb - addressed in versions 5.14.21-150400.24.179.1, 5.14.21-150500.55.124.1
kernel-default-base - addressed in versions 5.14.21-150400.24.179.1.150400.24.92.1, 5.14.21-150500.55.124.1.150500.6.59.1
kernel-default-base-rebuild - addressed in versions 5.14.21-150400.24.179.1.150400.24.92.1, 5.14.21-150500.55.124.1.150500.6.59.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
gfs2-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt-optional - update to 5.14.21-150500.13.109.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.109.1
kernel-rt-devel - update to 5.14.21-150500.13.109.1
cluster-md-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.109.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.109.1
kernel-rt_debug - update to 5.14.21-150500.13.109.1
kernel-syms-rt - update to 5.14.21-150500.13.109.1
kselftests-kmp-rt - update to 5.14.21-150500.13.109.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.109.1
kernel-devel-rt - update to 5.14.21-150500.13.109.1
dlm-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-livepatch - update to 5.14.21-150500.13.109.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.109.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.109.1
kernel-rt-vdso - update to 5.14.21-150500.13.109.1
kernel-rt-extra - update to 5.14.21-150500.13.109.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
kernel-kvmsmall-vdso - update to 5.14.21-150500.55.124.1
kernel-kvmsmall-vdso-debuginfo - update to 5.14.21-150500.55.124.1
kernel-default-vdso-debuginfo - update to 5.14.21-150500.55.124.1
kernel-default-vdso - update to 5.14.21-150500.55.124.1

External References

Related Security Bulletins