NULL pointer dereference in Linux kernel - CVE-2025-38440

Vulnerability identifier: #VU113266

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-2025-38440

CWE-ID: CWE-476

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 NULL pointer dereference within the mlx5e_dim_rx_change() and mlx5e_dim_tx_change() functions in drivers/net/ethernet/mellanox/mlx5/core/en_dim.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
Basesystem Module
Public Cloud Module
SUSE Real Time Module
SUSE Linux Enterprise Live Patching
Legacy Module
Development Tools Module
Ubuntu
kernel-livepatch-6_4_0-150700_7_16-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_16-rt
kernel-livepatch-SLE15-SP7-RT_Update_4-debugsource
kernel-livepatch-SLE15-SP7_Update_4-debugsource
kernel-livepatch-6_4_0-150700_53_16-default-debuginfo
kernel-livepatch-6_4_0-150700_53_16-default
kernel-rt-debugsource
cluster-md-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt-debuginfo
dlm-kmp-rt
cluster-md-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt-devel
kernel-syms-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
kernel-rt-devel-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-syms-azure
kernel-source-azure
kernel-devel-azure
kernel-azure-debuginfo
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-azure-debugsource
kernel-azure
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-64kb
kernel-default-extra-debuginfo
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb-devel
kernel-64kb-devel-debuginfo
kernel-default
kernel-default-debugsource
kernel-default-devel
kernel-default-debuginfo
kernel-default-devel-debuginfo
kernel-macros
kernel-devel
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-docs
kernel-syms
kernel-default-extra
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-source
kernel-obs-build
kernel-obs-build-debugsource
gfs2-kmp-default
kernel-default-base
linux (Debian package)
linux (Ubuntu package)
linux-oem-6.14 (Ubuntu package)
linux-realtime-6.14 (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws-6.14 (Ubuntu package)
linux-gcp-6.14 (Ubuntu package)

Install update from vendor's repository.

kernel-livepatch-6_4_0-150700_7_16-rt-debuginfo - update to 1-150700.1.3.2
kernel-livepatch-6_4_0-150700_7_16-rt - update to 1-150700.1.3.2
kernel-livepatch-SLE15-SP7-RT_Update_4-debugsource - update to 1-150700.1.3.2
kernel-livepatch-SLE15-SP7_Update_4-debugsource - update to 1-150700.15.3.2
kernel-livepatch-6_4_0-150700_53_16-default-debuginfo - update to 1-150700.15.3.2
kernel-livepatch-6_4_0-150700_53_16-default - update to 1-150700.15.3.2
kernel-rt-debugsource - update to 6.4.0-150700.7.16.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.16.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.16.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.16.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.16.1
dlm-kmp-rt - update to 6.4.0-150700.7.16.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.16.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.16.1
kernel-rt-devel - update to 6.4.0-150700.7.16.1
kernel-syms-rt - update to 6.4.0-150700.7.16.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.16.1
gfs2-kmp-rt - update to 6.4.0-150700.7.16.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.16.1
kernel-devel-rt - update to 6.4.0-150700.7.16.1
kernel-source-rt - update to 6.4.0-150700.7.16.1
kernel-rt - update to 6.4.0-150700.7.16.1
kernel-syms-azure - update to 6.4.0-150700.20.15.1
kernel-source-azure - update to 6.4.0-150700.20.15.2
kernel-devel-azure - update to 6.4.0-150700.20.15.2
kernel-azure-debuginfo - update to 6.4.0-150700.20.15.2
kernel-azure-devel - update to 6.4.0-150700.20.15.2
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.15.2
kernel-azure-debugsource - update to 6.4.0-150700.20.15.2
kernel-azure - update to 6.4.0-150700.20.15.2
kernel-default-livepatch-devel - update to 6.4.0-150700.53.16.1
kernel-default-livepatch - update to 6.4.0-150700.53.16.1
kernel-64kb - update to 6.4.0-150700.53.16.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.16.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.16.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.16.1
kernel-64kb-devel - update to 6.4.0-150700.53.16.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.16.1
kernel-default - update to 6.4.0-150700.53.16.1
kernel-default-debugsource - update to 6.4.0-150700.53.16.1
kernel-default-devel - update to 6.4.0-150700.53.16.1
kernel-default-debuginfo - update to 6.4.0-150700.53.16.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.16.1
kernel-macros - update to 6.4.0-150700.53.16.1
kernel-devel - update to 6.4.0-150700.53.16.1
kernel-zfcpdump - update to 6.4.0-150700.53.16.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.16.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.16.1
kernel-docs - update to 6.4.0-150700.53.16.1
kernel-syms - update to 6.4.0-150700.53.16.1
kernel-default-extra - update to 6.4.0-150700.53.16.1
cluster-md-kmp-default - update to 6.4.0-150700.53.16.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.16.1
ocfs2-kmp-default - update to 6.4.0-150700.53.16.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.16.1
dlm-kmp-default - update to 6.4.0-150700.53.16.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.16.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.16.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.16.1
reiserfs-kmp-default - update to 6.4.0-150700.53.16.1
kernel-source - update to 6.4.0-150700.53.16.1
kernel-obs-build - update to 6.4.0-150700.53.16.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.16.1
gfs2-kmp-default - update to 6.4.0-150700.53.16.1
kernel-default-base - update to 6.4.0-150700.53.16.1.150700.17.11.2
linux (Debian package) - update to 6.12.41-1
linux (Ubuntu package) - addressed in versions 6.14.0-36.36, 6.14.0-36.36~24.04.1, 6.14.0-1016.16~24.04.1, 6.14.0-1017.17, 6.14.0-1020.21
linux-oem-6.14 (Ubuntu package) - update to 6.14.0-1016.16
linux-realtime-6.14 (Ubuntu package) - update to 6.14.0-1016.16~24.04.1
linux-azure (Ubuntu package) - addressed in versions 6.14.0-1017.17, 6.14.0-1017.17~24.04.1
linux-aws-6.14 (Ubuntu package) - update to 6.14.0-1017.17~24.04.1
linux-gcp-6.14 (Ubuntu package) - addressed in versions 6.14.0-1018.18, 6.14.0-1020.21~24.04.1

• https://git.kernel.org/stable/c/2bc6fb90486e42dd80e660ef7a40c02b2516c6d6
• https://git.kernel.org/stable/c/7581afc051542e11ccf3ade68acd01b7fb1a3cde
• https://git.kernel.org/stable/c/eb41a264a3a576dc040ee37c3d9d6b7e2d9be968

• NULL pointer dereference in Linux kernel mlx5 core driver
• Debian update for linux
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux-oem-6.14
• Ubuntu update for linux-realtime-6.14
• Ubuntu update for linux
• Ubuntu update for linux-aws-6.14
• Ubuntu update for linux-gcp-6.14
• Ubuntu update for linux-azure