Memory leak in Linux kernel - CVE-2025-68775

Vulnerability identifier: #VU121364

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-2025-68775

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to memory leak within the handshake_req_cancel() function in net/handshake/request.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Basesystem Module
Legacy Module
Development Tools Module
Public Cloud Module
openSUSE Leap
Ubuntu
kernel-livepatch-6_4_0-150600_23_87-default
kernel-livepatch-6_4_0-150600_23_87-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_20-debugsource
kernel-livepatch-SLE15-SP7-RT_Update_9-debugsource
kernel-livepatch-6_4_0-150700_7_31-rt
kernel-livepatch-6_4_0-150700_7_31-rt-debuginfo
kernel-livepatch-6_4_0-150700_53_31-default
kernel-livepatch-SLE15-SP7_Update_9-debugsource
kernel-livepatch-6_4_0-150700_53_31-default-debuginfo
kernel-default-livepatch-devel
dtb-marvell
kernel-default-devel-debuginfo
kernel-64kb-debugsource
kernel-obs-build-debugsource
kernel-64kb-devel-debuginfo
kernel-64kb-devel
dtb-amlogic
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-kvmsmall
gfs2-kmp-default
kernel-default-extra-debuginfo
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default
kernel-default-optional-debuginfo
dlm-kmp-default-debuginfo
kernel-default-debugsource
kernel-default-optional
kernel-obs-qa
kernel-default-devel
gfs2-kmp-default-debuginfo
cluster-md-kmp-default
kselftests-kmp-default-debuginfo
kselftests-kmp-default
kernel-syms
dtb-renesas
ocfs2-kmp-64kb
dtb-apple
kernel-64kb-optional
kernel-64kb-extra
dtb-cavium
ocfs2-kmp-64kb-debuginfo
dtb-socionext
dtb-allwinner
kernel-64kb-extra-debuginfo
dtb-sprd
reiserfs-kmp-64kb-debuginfo
dtb-amd
dtb-altera
dtb-apm
cluster-md-kmp-64kb-debuginfo
kernel-64kb-debuginfo
dtb-lg
dlm-kmp-64kb
kernel-64kb-optional-debuginfo
dtb-hisilicon
dtb-amazon
dtb-freescale
dtb-qcom
gfs2-kmp-64kb
kselftests-kmp-64kb-debuginfo
cluster-md-kmp-64kb
gfs2-kmp-64kb-debuginfo
dtb-nvidia
dtb-broadcom
dtb-mediatek
kernel-default-debuginfo
kernel-source
kernel-debug-debugsource
kernel-debug-devel
kernel-debug-devel-debuginfo
kernel-debug-debuginfo
kernel-debug
kernel-devel
kernel-docs-html
kernel-macros
kernel-source-vanilla
kernel-default-livepatch
kernel-docs
dtb-exynos
dtb-xilinx
dlm-kmp-64kb-debuginfo
kselftests-kmp-64kb
reiserfs-kmp-64kb
dtb-rockchip
dtb-arm
kernel-64kb
kernel-default-vdso
kernel-obs-build
reiserfs-kmp-default-debuginfo
kernel-default-vdso-debuginfo
dlm-kmp-default
reiserfs-kmp-default
ocfs2-kmp-default
kernel-default-extra
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-devel
kernel-debug-vdso
kernel-debug-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-default-base
kernel-default-base-rebuild
kernel-devel-rt
kernel-syms-rt
kernel-source-rt
dlm-kmp-rt
kernel-rt-devel-debuginfo
cluster-md-kmp-rt
kernel-rt-devel
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
cluster-md-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-devel-azure
kernel-source-azure
kernel-azure-devel-debuginfo
kernel-azure-debugsource
kernel-syms-azure
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure
linux (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-xilinx (Ubuntu package)
linux-oracle (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux (Debian package)
linux-aws (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
linux-gcp (Ubuntu package)
linux-raspi (Ubuntu package)

Install update from vendor's repository.

kernel-livepatch-6_4_0-150600_23_87-default - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150600_23_87-default-debuginfo - update to 1-150600.13.3.1
kernel-livepatch-SLE15-SP6_Update_20-debugsource - update to 1-150600.13.3.1
kernel-livepatch-SLE15-SP7-RT_Update_9-debugsource - update to 1-150700.1.3.2
kernel-livepatch-6_4_0-150700_7_31-rt - update to 1-150700.1.3.2
kernel-livepatch-6_4_0-150700_7_31-rt-debuginfo - update to 1-150700.1.3.2
kernel-livepatch-6_4_0-150700_53_31-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_9-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_31-default-debuginfo - update to 1-150700.15.3.1
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
dtb-marvell - update to 6.4.0-150600.23.87.1
kernel-default-devel-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-64kb-debugsource - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-64kb-devel - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
dtb-amlogic - update to 6.4.0-150600.23.87.1
dtb-aarch64 - update to 6.4.0-150600.23.87.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-kvmsmall - update to 6.4.0-150600.23.87.1
gfs2-kmp-default - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
cluster-md-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
ocfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.87.1
dlm-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default-debugsource - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default-optional - update to 6.4.0-150600.23.87.1
kernel-obs-qa - update to 6.4.0-150600.23.87.1
kernel-default-devel - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
gfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
cluster-md-kmp-default - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.87.1
kselftests-kmp-default - update to 6.4.0-150600.23.87.1
kernel-syms - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
dtb-renesas - update to 6.4.0-150600.23.87.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.87.1
dtb-apple - update to 6.4.0-150600.23.87.1
kernel-64kb-optional - update to 6.4.0-150600.23.87.1
kernel-64kb-extra - update to 6.4.0-150600.23.87.1
dtb-cavium - update to 6.4.0-150600.23.87.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.87.1
dtb-socionext - update to 6.4.0-150600.23.87.1
dtb-allwinner - update to 6.4.0-150600.23.87.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.87.1
dtb-sprd - update to 6.4.0-150600.23.87.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.87.1
dtb-amd - update to 6.4.0-150600.23.87.1
dtb-altera - update to 6.4.0-150600.23.87.1
dtb-apm - update to 6.4.0-150600.23.87.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.87.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
dtb-lg - update to 6.4.0-150600.23.87.1
dlm-kmp-64kb - update to 6.4.0-150600.23.87.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.87.1
dtb-hisilicon - update to 6.4.0-150600.23.87.1
dtb-amazon - update to 6.4.0-150600.23.87.1
dtb-freescale - update to 6.4.0-150600.23.87.1
dtb-qcom - update to 6.4.0-150600.23.87.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.87.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.87.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.87.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.87.1
dtb-nvidia - update to 6.4.0-150600.23.87.1
dtb-broadcom - update to 6.4.0-150600.23.87.1
dtb-mediatek - update to 6.4.0-150600.23.87.1
kernel-default-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-source - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-debug-debugsource - update to 6.4.0-150600.23.87.1
kernel-debug-devel - update to 6.4.0-150600.23.87.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.87.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.87.1
kernel-debug - update to 6.4.0-150600.23.87.1
kernel-devel - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-docs-html - update to 6.4.0-150600.23.87.1
kernel-macros - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-source-vanilla - update to 6.4.0-150600.23.87.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-docs - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
dtb-exynos - update to 6.4.0-150600.23.87.1
dtb-xilinx - update to 6.4.0-150600.23.87.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.87.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.87.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.87.1
dtb-rockchip - update to 6.4.0-150600.23.87.1
dtb-arm - update to 6.4.0-150600.23.87.1
kernel-64kb - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default-vdso - update to 6.4.0-150600.23.87.1
kernel-obs-build - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.87.1
dlm-kmp-default - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
ocfs2-kmp-default - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.87.1, 6.4.0-150700.53.31.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.87.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.87.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.87.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.87.1
kernel-debug-vdso - update to 6.4.0-150600.23.87.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.87.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.87.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.87.1
kernel-default-base - addressed in versions 6.4.0-150600.23.87.1.150600.12.40.1, 6.4.0-150700.53.31.1.150700.17.21.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.87.1.150600.12.40.1
kernel-devel-rt - update to 6.4.0-150700.7.31.1
kernel-syms-rt - update to 6.4.0-150700.7.31.1
kernel-source-rt - update to 6.4.0-150700.7.31.1
dlm-kmp-rt - update to 6.4.0-150700.7.31.2
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.31.2
cluster-md-kmp-rt - update to 6.4.0-150700.7.31.2
kernel-rt-devel - update to 6.4.0-150700.7.31.2
gfs2-kmp-rt - update to 6.4.0-150700.7.31.2
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
kernel-rt - update to 6.4.0-150700.7.31.2
kernel-rt-debuginfo - update to 6.4.0-150700.7.31.2
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
ocfs2-kmp-rt - update to 6.4.0-150700.7.31.2
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
kernel-rt-debugsource - update to 6.4.0-150700.7.31.2
kernel-devel-azure - update to 6.4.0-150700.20.27.1
kernel-source-azure - update to 6.4.0-150700.20.27.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.27.1
kernel-azure-debugsource - update to 6.4.0-150700.20.27.1
kernel-syms-azure - update to 6.4.0-150700.20.27.1
kernel-azure-devel - update to 6.4.0-150700.20.27.1
kernel-azure-debuginfo - update to 6.4.0-150700.20.27.1
kernel-azure - update to 6.4.0-150700.20.27.1
linux (Ubuntu package) - addressed in versions 6.8.0-110.110, 6.8.0-110.110.1, 6.8.0-110.110.1~22.04.1, 6.8.0-1037.40, 6.8.0-1050.56, 6.8.0-1051.51, 6.8.0-1052.55~22.04.1, 6.8.0-1054.57, 6.17.0-22.22, 6.17.0-1010.11
linux-aws-fips (Ubuntu package) - addressed in versions 6.8.0-110.110+fips2, 6.8.0-1052.55+fips1, 6.8.0-1054.57+fips1
linux-hwe-6.8 (Ubuntu package) - addressed in versions 6.8.0-110.110~22.04.1, 6.8.0-1051.51~22.04.1, 6.8.0-1052.56
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1022.22
linux-xilinx (Ubuntu package) - update to 6.8.0-1029.30
linux-oracle (Ubuntu package) - addressed in versions 6.8.0-1049.50, 6.8.0-1049.50~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1051.54, 6.8.0-1051.54~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1051.54.1
linux-gcp-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1054.60, 6.17.0-1013.13, 6.17.0-1013.13~24.04.1, 6.17.0-1020.20
linux-azure-fips (Ubuntu package) - update to 6.8.0-1054.60+fips1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2042.43
linux-realtime (Ubuntu package) - update to 6.8.1-1047.48
linux (Debian package) - update to 6.12.69-1
linux-aws (Ubuntu package) - addressed in versions 6.17.0-22.22~24.04.1, 6.17.0-1011.11, 6.17.0-1011.11~24.04.1, 6.17.0-1012.12, 6.17.0-1012.12~24.04.1
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1010.11~24.04.1
linux-gcp (Ubuntu package) - addressed in versions 6.17.0-1012.12, 6.17.0-1012.12~24.04.1
linux-raspi (Ubuntu package) - update to 6.17.0-1014.14

• https://git.kernel.org/stable/c/011ae80c49d9bfa5b4336f8bd387cd25c7593663
• https://git.kernel.org/stable/c/15564bd67e2975002f2a8e9defee33e321d3183f
• https://git.kernel.org/stable/c/3c330f1dee3cd92b57e19b9d21dc8ce5970b09be
• https://git.kernel.org/stable/c/e1641177e7fb48a0a5a06658d4aab51da6656659

• Memory leak in Linux kernel handshake
• Debian update for linux
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux-realtime-6.17
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-aws-fips
• Ubuntu update for linux-realtime
• Ubuntu update for linux-gcp
• Ubuntu update for linux-raspi-realtime
• Ubuntu update for linux-oracle
• Ubuntu update for linux-hwe-6.8
• Ubuntu update for linux-aws
• Ubuntu update for linux-nvidia-lowlatency
• Ubuntu update for linux-gcp-6.8
• Ubuntu update for linux-azure
• Ubuntu update for linux-xilinx
• Ubuntu update for linux-azure-fips
• Ubuntu update for linux-azure
• Ubuntu update for linux-raspi
• Ubuntu update for linux-nvidia-tegra