Resource management error in Linux kernel - CVE-2025-21976

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Main Vulnerability Database Vulnerabilities #VU106862

Resource management error in Linux kernel - CVE-2025-21976

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


Vulnerability identifier: #VU106862
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-2025-21976
CWE-ID: CWE-399
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error within the hvfb_putmem(), hvfb_ops_damage_area(), hvfb_probe() and hvfb_remove() functions in drivers/video/fbdev/hyperv_fb.c. A local user can perform a denial of service (DoS) attack.


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 Live Patching
Ubuntu
openEuler
kgraft-patch-4_12_14-122_258-default
kernel-default-debuginfo
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-debugsource
kernel-default-devel-debuginfo
kernel-default-base
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
kernel-default-devel
kernel-default
kernel-devel
kernel-macros
kernel-source
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-man
bpftool
kernel
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-headers
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
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)

How to mitigate CVE-2025-21976

Install update from vendor's website.

Linux kernel - addressed in versions 6.12.20, 6.13.8, 6.14
kgraft-patch-4_12_14-122_258-default - update to 1-8.3.1
kernel-default-debuginfo - update to 4.12.14-122.258.1
dlm-kmp-default - update to 4.12.14-122.258.1
gfs2-kmp-default - update to 4.12.14-122.258.1
cluster-md-kmp-default - update to 4.12.14-122.258.1
kernel-default-base-debuginfo - update to 4.12.14-122.258.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.258.1
kernel-syms - update to 4.12.14-122.258.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.258.1
kernel-default-debugsource - update to 4.12.14-122.258.1
kernel-default-devel-debuginfo - update to 4.12.14-122.258.1
kernel-default-base - update to 4.12.14-122.258.1
ocfs2-kmp-default - update to 4.12.14-122.258.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.258.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.258.1
kernel-default-devel - update to 4.12.14-122.258.1
kernel-default - update to 4.12.14-122.258.1
kernel-devel - update to 4.12.14-122.258.1
kernel-macros - update to 4.12.14-122.258.1
kernel-source - update to 4.12.14-122.258.1
kernel-default-kgraft-devel - update to 4.12.14-122.258.1
kernel-default-kgraft - update to 4.12.14-122.258.1
kernel-default-man - update to 4.12.14-122.258.1
bpftool - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
bpftool-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-debugsource - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-devel - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-headers - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-source - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-devel - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
perf - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
perf-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
linux (Ubuntu package) - addressed in versions 6.8.0-84.84, 6.8.0-84.84.1, 6.8.0-84.84.1~22.04.1, 6.8.0-1023.25, 6.8.0-1036.40, 6.8.0-1039.41, 6.8.0-1040.42
linux-hwe-6.8 (Ubuntu package) - addressed in versions 6.8.0-84.84~22.04.1, 6.8.0-85.85~22.04.1
linux-azure-nvidia (Ubuntu package) - update to 6.8.0-1025.27
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1036.42~22.04.1, 6.8.0-1038.44
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1037.37, 6.8.0-1037.37~22.04.1
linux-oracle (Ubuntu package) - update to 6.8.0-1037.38
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1037.38~22.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1039.41~22.04.1, 6.8.0-1040.42~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1039.42, 6.8.0-1039.42.1, 6.8.0-1039.42~22.04.1
linux-raspi (Ubuntu package) - update to 6.8.0-1039.43
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2031.32
linux-realtime (Ubuntu package) - update to 6.8.1-1034.35
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1034.35~22.04.1

External References

Related Security Bulletins