Memory leak in Linux kernel - CVE-2023-53593

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Main Vulnerability Database Vulnerabilities #VU116485

Memory leak in Linux kernel - CVE-2023-53593

Published: October 4, 2025 / Updated: October 27, 2025


Vulnerability identifier: #VU116485
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-2023-53593
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 cifs_readpage_worker() function in fs/cifs/file.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Legacy Module
Development Tools Module
Basesystem Module
Public Cloud Module
openSUSE Leap
kgraft-patch-4_12_14-122_280-default
kernel-livepatch-6_4_0-150600_10_58-rt-debuginfo
kernel-livepatch-6_4_0-150600_10_58-rt
kernel-livepatch-6_4_0-150600_23_78-default
kernel-livepatch-6_4_0-150600_23_78-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_17-debugsource
kernel-livepatch-6_4_0-150700_7_22-rt
kernel-livepatch-6_4_0-150700_7_22-rt-debuginfo
kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource
kernel-livepatch-SLE15-SP7_Update_6-debugsource
kernel-livepatch-6_4_0-150700_53_22-default
kernel-livepatch-6_4_0-150700_53_22-default-debuginfo
kernel-default
kernel-default-kgraft
gfs2-kmp-default-debuginfo
kernel-syms
kernel-default-kgraft-devel
kernel-default-base
kernel-default-devel-debuginfo
kernel-default-man
kernel-macros
kernel-devel
kernel-source
gfs2-kmp-default
kernel-default-base-debuginfo
kernel-default-debuginfo
ocfs2-kmp-default
kernel-default-devel
cluster-md-kmp-default
dlm-kmp-default
cluster-md-kmp-default-debuginfo
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-debugsource
reiserfs-kmp-azure-debuginfo
kernel-azure
kernel-azure-extra-debuginfo
kernel-azure-debugsource
dlm-kmp-azure-debuginfo
kernel-azure-optional
cluster-md-kmp-azure
ocfs2-kmp-azure-debuginfo
kernel-azure-devel
cluster-md-kmp-azure-debuginfo
kernel-azure-debuginfo
kernel-azure-optional-debuginfo
gfs2-kmp-azure
dlm-kmp-azure
reiserfs-kmp-azure
kernel-azure-devel-debuginfo
kernel-azure-extra
kselftests-kmp-azure
ocfs2-kmp-azure
kernel-syms-azure
kselftests-kmp-azure-debuginfo
gfs2-kmp-azure-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-azure-vdso-debuginfo
kernel-azure-vdso
kernel-rt-livepatch-devel
reiserfs-kmp-rt
kernel-rt-optional-debuginfo
kselftests-kmp-rt
kernel-devel-rt
kernel-rt
kernel-rt_debug
kernel-source-rt
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-vdso-debuginfo
kselftests-kmp-rt-debuginfo
kernel-rt_debug-vdso
kernel-rt-vdso-debuginfo
kernel-rt-extra-debuginfo
kernel-rt-optional
reiserfs-kmp-rt-debuginfo
kernel-rt-extra
kernel-rt-vdso
dlm-kmp-rt
kernel-rt-debuginfo
dlm-kmp-rt-debuginfo
kernel-rt-debugsource
gfs2-kmp-rt-debuginfo
kernel-syms-rt
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt_debug-devel
kernel-rt_debug-debugsource
cluster-md-kmp-rt
kernel-rt_debug-debuginfo
gfs2-kmp-rt
kernel-rt-devel
kernel-rt-devel-debuginfo
dtb-mediatek
dtb-apm
reiserfs-kmp-64kb
ocfs2-kmp-64kb
kernel-64kb-optional
kselftests-kmp-64kb
dtb-nvidia
dtb-allwinner
kernel-64kb-extra-debuginfo
dtb-qcom
dtb-amd
kernel-64kb-debugsource
kernel-64kb-devel-debuginfo
cluster-md-kmp-64kb
dtb-apple
dlm-kmp-64kb
dtb-exynos
dtb-xilinx
kernel-64kb-devel
kernel-zfcpdump
kernel-64kb
dtb-amazon
kernel-64kb-debuginfo
kselftests-kmp-64kb-debuginfo
gfs2-kmp-64kb
dtb-marvell
dtb-hisilicon
dtb-sprd
dtb-socionext
dtb-amlogic
dtb-altera
kernel-64kb-optional-debuginfo
dtb-lg
dlm-kmp-64kb-debuginfo
gfs2-kmp-64kb-debuginfo
dtb-broadcom
dtb-cavium
ocfs2-kmp-64kb-debuginfo
cluster-md-kmp-64kb-debuginfo
dtb-renesas
kernel-kvmsmall-vdso-debuginfo
kernel-default-livepatch
kernel-default-extra
kernel-obs-qa
kernel-kvmsmall-devel
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-debug-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-default-vdso-debuginfo
dtb-freescale
kernel-default-vdso
kernel-debug-vdso
kernel-debug-debugsource
kernel-debug-devel
kernel-debug-debuginfo
kernel-debug-devel-debuginfo
kernel-debug
kernel-docs-html
kernel-source-vanilla
kernel-docs
reiserfs-kmp-default
kernel-obs-build
kselftests-kmp-default-debuginfo
reiserfs-kmp-default-debuginfo
kselftests-kmp-default
kernel-obs-build-debugsource
kernel-default-livepatch-devel
kernel-kvmsmall
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
dtb-aarch64
dtb-rockchip
kernel-64kb-extra
reiserfs-kmp-64kb-debuginfo
dtb-arm
kernel-default-extra-debuginfo
kernel-default-optional
kernel-default-optional-debuginfo
kernel-default-base-rebuild

How to mitigate CVE-2023-53593

Install update from vendor's repository.

Linux kernel - update to 4.14.324
kgraft-patch-4_12_14-122_280-default - update to 1-8.5.1
kernel-livepatch-6_4_0-150600_10_58-rt-debuginfo - update to 1-150600.1.3.1
kernel-livepatch-6_4_0-150600_10_58-rt - update to 1-150600.1.3.1
kernel-livepatch-6_4_0-150600_23_78-default - update to 1-150600.13.5.1
kernel-livepatch-6_4_0-150600_23_78-default-debuginfo - update to 1-150600.13.5.1
kernel-livepatch-SLE15-SP6_Update_17-debugsource - update to 1-150600.13.5.1
kernel-livepatch-6_4_0-150700_7_22-rt - update to 1-150700.1.3.1
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-SLE15-SP7_Update_6-debugsource - 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-6_4_0-150700_53_22-default-debuginfo - update to 1-150700.15.3.1
kernel-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-kgraft - update to 4.12.14-122.280.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-syms - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-kgraft-devel - update to 4.12.14-122.280.1
kernel-default-base - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1.150600.12.34.2, 6.4.0-150700.53.22.1.150700.17.15.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 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, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-devel - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-source - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
gfs2-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-base-debuginfo - update to 4.12.14-122.280.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-devel - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
dlm-kmp-default - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-debugsource - addressed in versions 4.12.14-122.280.1, 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
reiserfs-kmp-azure-debuginfo - update to 6.4.0-150600.8.55.1
kernel-azure - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
kernel-azure-extra-debuginfo - update to 6.4.0-150600.8.55.1
kernel-azure-debugsource - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
dlm-kmp-azure-debuginfo - update to 6.4.0-150600.8.55.1
kernel-azure-optional - update to 6.4.0-150600.8.55.1
cluster-md-kmp-azure - update to 6.4.0-150600.8.55.1
ocfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.55.1
kernel-azure-devel - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
cluster-md-kmp-azure-debuginfo - update to 6.4.0-150600.8.55.1
kernel-azure-debuginfo - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
kernel-azure-optional-debuginfo - update to 6.4.0-150600.8.55.1
gfs2-kmp-azure - update to 6.4.0-150600.8.55.1
dlm-kmp-azure - update to 6.4.0-150600.8.55.1
reiserfs-kmp-azure - update to 6.4.0-150600.8.55.1
kernel-azure-devel-debuginfo - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
kernel-azure-extra - update to 6.4.0-150600.8.55.1
kselftests-kmp-azure - update to 6.4.0-150600.8.55.1
ocfs2-kmp-azure - update to 6.4.0-150600.8.55.1
kernel-syms-azure - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
kselftests-kmp-azure-debuginfo - update to 6.4.0-150600.8.55.1
gfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.55.1
kernel-devel-azure - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
kernel-source-azure - addressed in versions 6.4.0-150600.8.55.1, 6.4.0-150700.20.18.1
kernel-azure-vdso-debuginfo - update to 6.4.0-150600.8.55.1
kernel-azure-vdso - update to 6.4.0-150600.8.55.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.58.1
reiserfs-kmp-rt - update to 6.4.0-150600.10.58.1
kernel-rt-optional-debuginfo - update to 6.4.0-150600.10.58.1
kselftests-kmp-rt - update to 6.4.0-150600.10.58.1
kernel-devel-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt_debug - update to 6.4.0-150600.10.58.1
kernel-source-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt_debug-devel-debuginfo - update to 6.4.0-150600.10.58.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.58.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.58.1
kernel-rt_debug-vdso - update to 6.4.0-150600.10.58.1
kernel-rt-vdso-debuginfo - update to 6.4.0-150600.10.58.1
kernel-rt-extra-debuginfo - update to 6.4.0-150600.10.58.1
kernel-rt-optional - update to 6.4.0-150600.10.58.1
reiserfs-kmp-rt-debuginfo - update to 6.4.0-150600.10.58.1
kernel-rt-extra - update to 6.4.0-150600.10.58.1
kernel-rt-vdso - update to 6.4.0-150600.10.58.1
dlm-kmp-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt-debuginfo - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
dlm-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt-debugsource - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
gfs2-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-syms-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
ocfs2-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
cluster-md-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
ocfs2-kmp-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt_debug-devel - update to 6.4.0-150600.10.58.1
kernel-rt_debug-debugsource - update to 6.4.0-150600.10.58.1
cluster-md-kmp-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt_debug-debuginfo - update to 6.4.0-150600.10.58.1
gfs2-kmp-rt - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt-devel - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
kernel-rt-devel-debuginfo - addressed in versions 6.4.0-150600.10.58.1, 6.4.0-150700.7.22.1
dtb-mediatek - update to 6.4.0-150600.23.78.1
dtb-apm - update to 6.4.0-150600.23.78.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.78.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.78.1
kernel-64kb-optional - update to 6.4.0-150600.23.78.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.78.1
dtb-nvidia - update to 6.4.0-150600.23.78.1
dtb-allwinner - update to 6.4.0-150600.23.78.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.78.1
dtb-qcom - update to 6.4.0-150600.23.78.1
dtb-amd - update to 6.4.0-150600.23.78.1
kernel-64kb-debugsource - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.78.1
dtb-apple - update to 6.4.0-150600.23.78.1
dlm-kmp-64kb - update to 6.4.0-150600.23.78.1
dtb-exynos - update to 6.4.0-150600.23.78.1
dtb-xilinx - update to 6.4.0-150600.23.78.1
kernel-64kb-devel - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-64kb - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
dtb-amazon - update to 6.4.0-150600.23.78.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.78.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.78.1
dtb-marvell - update to 6.4.0-150600.23.78.1
dtb-hisilicon - update to 6.4.0-150600.23.78.1
dtb-sprd - update to 6.4.0-150600.23.78.1
dtb-socionext - update to 6.4.0-150600.23.78.1
dtb-amlogic - update to 6.4.0-150600.23.78.1
dtb-altera - update to 6.4.0-150600.23.78.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.78.1
dtb-lg - update to 6.4.0-150600.23.78.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.78.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.78.1
dtb-broadcom - update to 6.4.0-150600.23.78.1
dtb-cavium - update to 6.4.0-150600.23.78.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.78.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.78.1
dtb-renesas - update to 6.4.0-150600.23.78.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.78.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-obs-qa - update to 6.4.0-150600.23.78.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.78.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.78.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.78.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.78.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.78.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.78.1
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.78.1
dtb-freescale - update to 6.4.0-150600.23.78.1
kernel-default-vdso - update to 6.4.0-150600.23.78.1
kernel-debug-vdso - update to 6.4.0-150600.23.78.1
kernel-debug-debugsource - update to 6.4.0-150600.23.78.1
kernel-debug-devel - update to 6.4.0-150600.23.78.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.78.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.78.1
kernel-debug - update to 6.4.0-150600.23.78.1
kernel-docs-html - update to 6.4.0-150600.23.78.1
kernel-source-vanilla - update to 6.4.0-150600.23.78.1
kernel-docs - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-obs-build - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.78.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kselftests-kmp-default - update to 6.4.0-150600.23.78.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-kvmsmall - update to 6.4.0-150600.23.78.1
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
dtb-aarch64 - update to 6.4.0-150600.23.78.1
dtb-rockchip - update to 6.4.0-150600.23.78.1
kernel-64kb-extra - update to 6.4.0-150600.23.78.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.78.1
dtb-arm - update to 6.4.0-150600.23.78.1
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.78.1, 6.4.0-150700.53.22.1
kernel-default-optional - update to 6.4.0-150600.23.78.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.78.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.78.1.150600.12.34.2

External References

Related Security Bulletins