Buffer overflow in Linux kernel - CVE-2025-21927

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Main Vulnerability Database Vulnerabilities #VU106844

Buffer overflow in Linux kernel - CVE-2025-21927

Published: April 2, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU106844
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2025-21927
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability: No public exploit available
Affected software:
Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 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
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
SUSE Linux Enterprise Live Patching
Confidential Computing Module
SUSE Real Time Module
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
openSUSE Leap
openEuler
Ubuntu
Anolis OS
Netezza Appliance
Verify Identity Access Digital Credentials
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kpatch-patch-5_14_0-284_104_1 (Red Hat package)
kpatch-patch-5_14_0-427_55_1 (Red Hat package)
kpatch-patch-5_14_0-70_124_1 (Red Hat package)
kpatch-patch-5_14_0-503_26_1 (Red Hat package)
kpatch-patch-5_14_0-284_92_1 (Red Hat package)
kpatch-patch-5_14_0-427_44_1 (Red Hat package)
kpatch-patch-5_14_0-503_15_1 (Red Hat package)
kpatch-patch-5_14_0-70_121_1 (Red Hat package)
kpatch-patch-5_14_0-70_112_1 (Red Hat package)
kpatch-patch-5_14_0-284_79_1 (Red Hat package)
kpatch-patch-5_14_0-427_31_1 (Red Hat package)
kpatch-patch-5_14_0-427_13_1 (Red Hat package)
kgraft-patch-4_12_14-122_258-default
kpatch-patch-5_14_0-70_85_1 (Red Hat package)
kpatch-patch-5_14_0-284_52_1 (Red Hat package)
kernel-livepatch-6_4_0-150600_10_39-rt
kernel-livepatch-6_4_0-150600_10_39-rt-debuginfo
kernel-livepatch-SLE15-SP6-RT_Update_11-debugsource
kernel-livepatch-SLE15-SP7_Update_1-debugsource
kernel-livepatch-6_4_0-150700_53_3-default-debuginfo
kernel-livepatch-6_4_0-150700_53_3-default
kernel-default-debugsource
kernel-default-man
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-source
kernel-macros
kernel-devel
kernel-default
kernel-default-devel
gfs2-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
ocfs2-kmp-default
kernel-default-base
dlm-kmp-default
gfs2-kmp-default
cluster-md-kmp-default
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
kernel-syms
dlm-kmp-default-debuginfo
kernel-default-devel-debuginfo
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-headers
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-coco-vdso-debuginfo
kernel-coco-devel
kernel-syms-coco
kernel-coco_debug-debuginfo
kernel-coco
kernel-coco_debug
kernel-coco_debug-devel
kernel-coco-debugsource
reiserfs-kmp-coco
kernel-coco_debug-debugsource
kernel-coco_debug-devel-debuginfo
kernel-coco-debuginfo
reiserfs-kmp-coco-debuginfo
kernel-devel-coco
kernel-source-coco
gfs2-kmp-azure-debuginfo
reiserfs-kmp-azure-debuginfo
kernel-azure-optional
kernel-azure-debugsource
kernel-azure-devel
cluster-md-kmp-azure-debuginfo
kernel-azure-optional-debuginfo
ocfs2-kmp-azure
cluster-md-kmp-azure
kernel-azure-extra-debuginfo
kernel-syms-azure
gfs2-kmp-azure
ocfs2-kmp-azure-debuginfo
kernel-azure-extra
reiserfs-kmp-azure
kselftests-kmp-azure
kernel-azure-devel-debuginfo
kselftests-kmp-azure-debuginfo
dlm-kmp-azure-debuginfo
kernel-devel-azure
kernel-source-azure
dlm-kmp-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure
kernel-azure-debuginfo
kernel-rt-extra
kernel-rt-debugsource
cluster-md-kmp-rt
kernel-rt-vdso
kernel-rt_debug-devel
kselftests-kmp-rt
kernel-rt-vdso-debuginfo
kernel-rt_debug-debugsource
dlm-kmp-rt
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kselftests-kmp-rt-debuginfo
kernel-rt-livepatch-devel
kernel-rt_debug-vdso-debuginfo
gfs2-kmp-rt
reiserfs-kmp-rt
kernel-rt-devel-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt-optional-debuginfo
ocfs2-kmp-rt
kernel-rt_debug
kernel-rt
kernel-source-rt
kernel-devel-rt
kernel-rt-devel
kernel-rt-extra-debuginfo
kernel-syms-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-vdso
kernel-rt_debug-devel-debuginfo
kernel-rt-debuginfo
kernel-rt-optional
kernel-default-livepatch
kernel-default-extra-debuginfo
kernel-default-extra
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-64kb
kernel-obs-build
kernel-obs-build-debugsource
kernel-docs
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel
kernel-default-livepatch-devel
kernel-64k-devel
kernel-64k
kernel-64k-debug
kernel-64k-debug-devel
kernel-debug
kernel-debug-devel
kernel-tools-libs
kernel-tools-libs-devel
linux (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-azure (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-oem-6.11 (Ubuntu package)
IBM Security Verify Access
IBM API Connect
Red Hat OpenShift Dev Spaces
OpenShift Logging
Red Hat OpenShift Container Platform

Detailed vulnerability description

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

The vulnerability exists due to memory corruption within the nvme_tcp_queue_id() and nvme_tcp_recv_pdu() functions in drivers/nvme/host/tcp.c. A local user can escalate privileges on the system.


How to mitigate CVE-2025-21927

Install update from vendor's website.

Sources