Use-after-free in Linux kernel - CVE-2025-40037

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU117724

Use-after-free in Linux kernel - CVE-2025-40037

Published: October 28, 2025


Vulnerability identifier: #VU117724
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2025-40037
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free error within the simplefb_destroy(), simplefb_detach_genpds(), simplefb_attach_genpds() and simplefb_probe() functions in drivers/video/fbdev/simplefb.c. A local user can escalate privileges on the system.


Affected software

Linux kernel
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Workstation Extension 15
Development Tools Module
Basesystem Module
SUSE Real Time Module
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Ubuntu
kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource
kernel-livepatch-6_4_0-150700_7_22-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_22-rt
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-rt-devel
kernel-rt-debuginfo
kernel-rt-debugsource
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-syms-rt
kernel-rt
cluster-md-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
gfs2-kmp-rt
kernel-source-rt
kernel-devel-rt
dlm-kmp-rt
kernel-azure-devel
kernel-azure
kernel-azure-debugsource
kernel-syms-azure
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-default-livepatch
kernel-64kb-debuginfo
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-64kb
kernel-64kb-devel
kernel-64kb-devel-debuginfo
kernel-64kb-debugsource
kernel-default
kernel-default-debuginfo
kernel-default-debugsource
kernel-default-devel-debuginfo
kernel-default-devel
kernel-macros
kernel-devel
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-obs-build-debugsource
gfs2-kmp-default
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
cluster-md-kmp-default
dlm-kmp-default
gfs2-kmp-default-debuginfo
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-source
kernel-obs-build
kernel-syms
kernel-docs
kernel-default-base
linux (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-xilinx (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-realtime (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

How to mitigate CVE-2025-40037

Install update from vendor's repository.

kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource - 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-6_4_0-150700_7_22-rt - 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-rt-devel - update to 6.4.0-150700.7.22.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.22.1
kernel-rt-debugsource - update to 6.4.0-150700.7.22.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.22.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.22.1
kernel-syms-rt - update to 6.4.0-150700.7.22.1
kernel-rt - update to 6.4.0-150700.7.22.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.22.1
gfs2-kmp-rt - update to 6.4.0-150700.7.22.1
kernel-source-rt - update to 6.4.0-150700.7.22.1
kernel-devel-rt - update to 6.4.0-150700.7.22.1
dlm-kmp-rt - update to 6.4.0-150700.7.22.1
kernel-azure-devel - update to 6.4.0-150700.20.18.1
kernel-azure - update to 6.4.0-150700.20.18.1
kernel-azure-debugsource - update to 6.4.0-150700.20.18.1
kernel-syms-azure - update to 6.4.0-150700.20.18.1
kernel-azure-debuginfo - update to 6.4.0-150700.20.18.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.18.1
kernel-devel-azure - update to 6.4.0-150700.20.18.1
kernel-source-azure - update to 6.4.0-150700.20.18.1
kernel-default-livepatch - update to 6.4.0-150700.53.22.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.22.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.22.1
kernel-default-extra - update to 6.4.0-150700.53.22.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.22.1
kernel-64kb - update to 6.4.0-150700.53.22.1
kernel-64kb-devel - update to 6.4.0-150700.53.22.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.22.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.22.1
kernel-default - update to 6.4.0-150700.53.22.1
kernel-default-debuginfo - update to 6.4.0-150700.53.22.1
kernel-default-debugsource - update to 6.4.0-150700.53.22.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.22.1
kernel-default-devel - update to 6.4.0-150700.53.22.1
kernel-macros - update to 6.4.0-150700.53.22.1
kernel-devel - update to 6.4.0-150700.53.22.1
kernel-zfcpdump - update to 6.4.0-150700.53.22.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.22.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.22.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.22.1
gfs2-kmp-default - update to 6.4.0-150700.53.22.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
ocfs2-kmp-default - update to 6.4.0-150700.53.22.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
cluster-md-kmp-default - update to 6.4.0-150700.53.22.1
dlm-kmp-default - update to 6.4.0-150700.53.22.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
reiserfs-kmp-default - update to 6.4.0-150700.53.22.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
kernel-source - update to 6.4.0-150700.53.22.1
kernel-obs-build - update to 6.4.0-150700.53.22.1
kernel-syms - update to 6.4.0-150700.53.22.1
kernel-docs - update to 6.4.0-150700.53.22.1
kernel-default-base - update to 6.4.0-150700.53.22.1.150700.17.15.1
linux (Ubuntu package) - addressed in versions 6.8.0-106.106, 6.8.0-106.106.1, 6.8.0-106.106.1~22.04.1, 6.8.0-106.106~22.04.1, 6.8.0-1035.38, 6.8.0-1047.48, 6.8.0-1047.48~22.04.1, 6.8.0-1048.53, 6.8.0-1049.49, 6.8.0-1049.49~22.04.1, 6.8.0-1050.53, 6.8.0-1052.55, 6.8.0-1052.55~22.04.1, 6.17.0-14.14, 6.17.0-1006.7, 6.17.0-1008.8
linux-aws-fips (Ubuntu package) - addressed in versions 6.8.0-106.106+fips1, 6.8.0-1050.53+fips1, 6.8.0-1052.55+fips1
linux-xilinx (Ubuntu package) - update to 6.8.0-1029.30
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1049.52, 6.8.0-1049.52.1, 6.8.0-1049.52~22.04.1
linux-aws-6.8 (Ubuntu package) - update to 6.8.0-1050.53~22.04.1
linux-raspi (Ubuntu package) - addressed in versions 6.8.0-1050.54, 6.8.0-2040.41
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1051.57, 6.17.0-1008.8
linux-azure-6.8 (Ubuntu package) - update to 6.8.0-1051.57~22.04.1
linux-azure-fips (Ubuntu package) - update to 6.8.0-1052.58+fips1
linux-realtime (Ubuntu package) - addressed in versions 6.8.1-1045.46, 6.8.1-1045.46~22.04.1
linux-aws (Ubuntu package) - update to 6.17.0-1007.7
linux-gcp (Ubuntu package) - update to 6.17.0-1007.7
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1011.11

External References

Related Security Bulletins