Buffer overflow in Linux kernel - CVE-2025-40364

Vulnerability identifier: #VU107790

CSH Severity: Low

CVSS v4 BT: 4.3 [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/E:U/U:Clear]

CVE-ID: CVE-2025-40364

CWE-ID: CWE-119

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 corruption within the io_alloc_async_data() and io_req_prep_async() functions in io_uring/io_uring.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Enterprise Server 15 SP3 Business Critical
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Enterprise Storage
SUSE Linux Enterprise Live Patching
openSUSE Leap
openEuler
kernel-livepatch-5_3_18-150300_59_207-default-debuginfo
kernel-livepatch-SLE15-SP3_Update_58-debugsource
kernel-livepatch-5_3_18-150300_59_207-default
kernel-livepatch-5_3_18-150300_59_207-preempt-debuginfo
kernel-livepatch-5_3_18-150300_59_207-preempt
ocfs2-kmp-64kb-debuginfo
dtb-allwinner
reiserfs-kmp-64kb
kernel-64kb-optional-debuginfo
kernel-64kb-extra
kernel-64kb-devel-debuginfo
kernel-64kb-optional
dtb-mediatek
kselftests-kmp-64kb
dtb-renesas
dlm-kmp-64kb-debuginfo
ocfs2-kmp-64kb
dtb-xilinx
dtb-freescale
dtb-amlogic
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-preempt
kernel-preempt-debugsource
ocfs2-kmp-preempt-debuginfo
cluster-md-kmp-preempt-debuginfo
cluster-md-kmp-preempt
gfs2-kmp-preempt-debuginfo
dtb-rockchip
kernel-64kb
dtb-al
kselftests-kmp-64kb-debuginfo
kernel-64kb-debuginfo
dtb-sprd
dtb-marvell
dtb-lg
dtb-hisilicon
kernel-64kb-debugsource
kernel-64kb-devel
reiserfs-kmp-64kb-debuginfo
dtb-socionext
dlm-kmp-64kb
gfs2-kmp-64kb-debuginfo
kernel-source
dtb-qcom
dtb-apm
dtb-altera
dtb-cavium
dtb-arm
cluster-md-kmp-64kb-debuginfo
cluster-md-kmp-64kb
dtb-zte
kernel-64kb-extra-debuginfo
dtb-amd
dtb-exynos
dtb-nvidia
gfs2-kmp-64kb
dtb-broadcom
dlm-kmp-default
kernel-default-livepatch
kernel-default-debuginfo
kernel-default-optional-debuginfo
kernel-default-debugsource
kernel-obs-qa
kernel-default-extra-debuginfo
kernel-default-optional
kselftests-kmp-default-debuginfo
reiserfs-kmp-default
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default
kernel-obs-build
reiserfs-kmp-default-debuginfo
kernel-preempt-extra
kernel-obs-build-debugsource
dlm-kmp-default-debuginfo
kselftests-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
kernel-default-extra
kernel-syms
kernel-docs-html
kernel-macros
kernel-devel
kernel-source-vanilla
kernel-docs
kernel-preempt-optional
kernel-preempt-debuginfo
reiserfs-kmp-preempt
kernel-preempt-devel-debuginfo
dlm-kmp-preempt
kernel-preempt-optional-debuginfo
kernel-preempt-extra-debuginfo
gfs2-kmp-preempt
kernel-preempt-devel
dlm-kmp-preempt-debuginfo
kselftests-kmp-preempt
ocfs2-kmp-preempt
reiserfs-kmp-preempt-debuginfo
kselftests-kmp-preempt-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel
kernel-kvmsmall
kernel-default-livepatch-devel
kernel-default
cluster-md-kmp-default-debuginfo
kernel-default-devel
kernel-default-devel-debuginfo
gfs2-kmp-default
kernel-default-base-rebuild
kernel-default-base
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-headers
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel

Install update from vendor's website.

Linux kernel - update to 6.6.78
kernel-livepatch-5_3_18-150300_59_207-default-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-SLE15-SP3_Update_58-debugsource - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_207-default - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_207-preempt-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_207-preempt - update to 1-150300.7.3.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.207.1
dtb-allwinner - update to 5.3.18-150300.59.207.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.207.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.207.1
kernel-64kb-extra - update to 5.3.18-150300.59.207.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.207.1
kernel-64kb-optional - update to 5.3.18-150300.59.207.1
dtb-mediatek - update to 5.3.18-150300.59.207.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.207.1
dtb-renesas - update to 5.3.18-150300.59.207.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.207.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.207.1
dtb-xilinx - update to 5.3.18-150300.59.207.1
dtb-freescale - update to 5.3.18-150300.59.207.1
dtb-amlogic - update to 5.3.18-150300.59.207.1
dtb-aarch64 - update to 5.3.18-150300.59.207.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.207.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.207.1
kernel-zfcpdump - update to 5.3.18-150300.59.207.1
kernel-preempt - update to 5.3.18-150300.59.207.1
kernel-preempt-debugsource - update to 5.3.18-150300.59.207.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.207.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.207.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.207.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.207.1
dtb-rockchip - update to 5.3.18-150300.59.207.1
kernel-64kb - update to 5.3.18-150300.59.207.1
dtb-al - update to 5.3.18-150300.59.207.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.207.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.207.1
dtb-sprd - update to 5.3.18-150300.59.207.1
dtb-marvell - update to 5.3.18-150300.59.207.1
dtb-lg - update to 5.3.18-150300.59.207.1
dtb-hisilicon - update to 5.3.18-150300.59.207.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.207.1
kernel-64kb-devel - update to 5.3.18-150300.59.207.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.207.1
dtb-socionext - update to 5.3.18-150300.59.207.1
dlm-kmp-64kb - update to 5.3.18-150300.59.207.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.207.1
kernel-source - update to 5.3.18-150300.59.207.1
dtb-qcom - update to 5.3.18-150300.59.207.1
dtb-apm - update to 5.3.18-150300.59.207.1
dtb-altera - update to 5.3.18-150300.59.207.1
dtb-cavium - update to 5.3.18-150300.59.207.1
dtb-arm - update to 5.3.18-150300.59.207.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.207.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.207.1
dtb-zte - update to 5.3.18-150300.59.207.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.207.1
dtb-amd - update to 5.3.18-150300.59.207.1
dtb-exynos - update to 5.3.18-150300.59.207.1
dtb-nvidia - update to 5.3.18-150300.59.207.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.207.1
dtb-broadcom - update to 5.3.18-150300.59.207.1
dlm-kmp-default - update to 5.3.18-150300.59.207.1
kernel-default-livepatch - update to 5.3.18-150300.59.207.1
kernel-default-debuginfo - update to 5.3.18-150300.59.207.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.207.1
kernel-default-debugsource - update to 5.3.18-150300.59.207.1
kernel-obs-qa - update to 5.3.18-150300.59.207.1
kernel-default-extra-debuginfo - update to 5.3.18-150300.59.207.1
kernel-default-optional - update to 5.3.18-150300.59.207.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.207.1
reiserfs-kmp-default - update to 5.3.18-150300.59.207.1
ocfs2-kmp-default-debuginfo - update to 5.3.18-150300.59.207.1
cluster-md-kmp-default - update to 5.3.18-150300.59.207.1
kernel-obs-build - update to 5.3.18-150300.59.207.1
reiserfs-kmp-default-debuginfo - update to 5.3.18-150300.59.207.1
kernel-preempt-extra - update to 5.3.18-150300.59.207.1
kernel-obs-build-debugsource - update to 5.3.18-150300.59.207.1
dlm-kmp-default-debuginfo - update to 5.3.18-150300.59.207.1
kselftests-kmp-default - update to 5.3.18-150300.59.207.1
gfs2-kmp-default-debuginfo - update to 5.3.18-150300.59.207.1
ocfs2-kmp-default - update to 5.3.18-150300.59.207.1
kernel-default-extra - update to 5.3.18-150300.59.207.1
kernel-syms - update to 5.3.18-150300.59.207.1
kernel-docs-html - update to 5.3.18-150300.59.207.1
kernel-macros - update to 5.3.18-150300.59.207.1
kernel-devel - update to 5.3.18-150300.59.207.1
kernel-source-vanilla - update to 5.3.18-150300.59.207.1
kernel-docs - update to 5.3.18-150300.59.207.1
kernel-preempt-optional - update to 5.3.18-150300.59.207.1
kernel-preempt-debuginfo - update to 5.3.18-150300.59.207.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.207.1
kernel-preempt-devel-debuginfo - update to 5.3.18-150300.59.207.1
dlm-kmp-preempt - update to 5.3.18-150300.59.207.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.207.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.207.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.207.1
kernel-preempt-devel - update to 5.3.18-150300.59.207.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.207.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.207.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.207.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.207.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.207.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.207.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.207.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.207.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.207.1
kernel-kvmsmall - update to 5.3.18-150300.59.207.1
kernel-default-livepatch-devel - update to 5.3.18-150300.59.207.1
kernel-default - update to 5.3.18-150300.59.207.1
cluster-md-kmp-default-debuginfo - update to 5.3.18-150300.59.207.1
kernel-default-devel - update to 5.3.18-150300.59.207.1
kernel-default-devel-debuginfo - update to 5.3.18-150300.59.207.1
gfs2-kmp-default - update to 5.3.18-150300.59.207.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.207.1.150300.18.124.1
kernel-default-base - update to 5.3.18-150300.59.207.1.150300.18.124.1
python3-perf-debuginfo - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
python3-perf - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
perf-debuginfo - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
perf - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-tools-devel - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-tools-debuginfo - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-tools - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-source - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-headers - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-devel - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-debugsource - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel-debuginfo - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
bpftool-debuginfo - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
bpftool - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102
kernel - addressed in versions 6.6.0-99.0.0.91, 6.6.0-99.0.0.102

• https://git.kernel.org/stable/c/a1b17713b32c75a90132ea2f92b1257f3bbc20f3
• https://git.kernel.org/stable/c/a94592ec30ff67dc36c424327f1e0a9ceeeb9bd3
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.78

• Buffer overflow in Linux kernel io_uring
• SUSE update for the Linux Kernel
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 24.03 LTS update for kernel