Reachable assertion in Linux kernel - CVE-2025-39900

Vulnerability identifier: #VU116243

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-2025-39900

CWE-ID: CWE-617

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 reachable assertion within the est_timer() function in net/core/gen_estimator.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Real Time Module
Basesystem Module
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Development Tools Module
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-default-extra-debuginfo
kernel-default-livepatch-devel
kernel-docs
kernel-64kb-debuginfo
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-64kb
kernel-obs-build-debugsource
kernel-syms
kernel-obs-build
kernel-source
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
gfs2-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-extra
kernel-default-base

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-default-extra-debuginfo - update to 6.4.0-150700.53.22.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.22.1
kernel-docs - update to 6.4.0-150700.53.22.1
kernel-64kb-debuginfo - 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-64kb - update to 6.4.0-150700.53.22.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.22.1
kernel-syms - update to 6.4.0-150700.53.22.1
kernel-obs-build - update to 6.4.0-150700.53.22.1
kernel-source - update to 6.4.0-150700.53.22.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
reiserfs-kmp-default - update to 6.4.0-150700.53.22.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
dlm-kmp-default - 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-debuginfo - update to 6.4.0-150700.53.22.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
ocfs2-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
gfs2-kmp-default - update to 6.4.0-150700.53.22.1
kernel-default-extra - 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

• https://git.kernel.org/stable/c/9f74c0ea9b26d1505d55b61e36b1623dd347e1d1
• https://git.kernel.org/stable/c/a22ec2ee824be30803068a52f78f7ffe3bc879fb
• https://git.kernel.org/stable/c/e79923824c48b930609680be04cb29253fc4a17d

• Reachable assertion in Linux kernel core
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel