Memory leak in Linux kernel - CVE-2024-50220

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Main Vulnerability Database Vulnerabilities #VU100160

Memory leak in Linux kernel - CVE-2024-50220

Published: November 10, 2024 / Updated: May 12, 2025


Vulnerability identifier: #VU100160
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-2024-50220
CWE-ID: CWE-401
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 memory leak within the mmap_write_unlock() function in kernel/fork.c, within the dup_userfaultfd_complete() function in fs/userfaultfd.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Ubuntu
openEuler
linux-image-realtime-hwe-24.04 (Ubuntu package)
linux-image-realtime (Ubuntu package)
linux-image-6.8.1-1020-realtime (Ubuntu package)
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
linux-image-virtual (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-6.8.0-58-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-58-lowlatency (Ubuntu package)
linux-image-6.8.0-58-generic-64k (Ubuntu package)
linux-image-6.8.0-58-generic (Ubuntu package)
linux-image-lowlatency-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-oem-22.04 (Ubuntu package)
linux-image-oem-22.04a (Ubuntu package)
linux-image-oem-22.04b (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
linux-image-oem-22.04d (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-gkeop-6.8 (Ubuntu package)
linux-image-gkeop (Ubuntu package)
linux-image-6.8.0-1010-gkeop (Ubuntu package)
linux-image-azure-nvidia (Ubuntu package)
linux-image-6.8.0-1014-azure-nvidia (Ubuntu package)
linux-image-6.8.0-1023-gke (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-ibm-classic (Ubuntu package)
linux-image-ibm-lts-24.04 (Ubuntu package)
linux-image-6.8.0-1024-ibm (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-oracle-64k-lts-24.04 (Ubuntu package)
linux-image-oracle-lts-24.04 (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-6.8.0-1024-oracle-64k (Ubuntu package)
linux-image-6.8.0-1024-oracle (Ubuntu package)
linux-image-6.8.0-1026-oem (Ubuntu package)
linux-image-oem-24.04 (Ubuntu package)
linux-image-oem-24.04a (Ubuntu package)
linux-image-6.8.0-1026-nvidia (Ubuntu package)
linux-image-6.8.0-1026-nvidia-64k (Ubuntu package)
linux-image-nvidia-64k (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-nvidia-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-1026-nvidia-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-1026-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia-6.8 (Ubuntu package)
linux-image-nvidia-64k-hwe-22.04 (Ubuntu package)
linux-image-nvidia-64k-6.8 (Ubuntu package)
linux-image-nvidia-hwe-22.04 (Ubuntu package)
linux-image-6.8.0-1027-aws (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-aws-lts-24.04 (Ubuntu package)
linux-image-azure-lts-24.04 (Ubuntu package)
linux-image-azure-fde-lts-24.04 (Ubuntu package)
linux-image-6.8.0-1027-azure (Ubuntu package)
linux-image-6.8.0-1027-azure-fde (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.8.0-1028-gcp (Ubuntu package)
linux-image-6.8.0-1028-gcp-64k (Ubuntu package)
linux-image-gcp-64k-lts-24.04 (Ubuntu package)
linux-image-gcp-lts-24.04 (Ubuntu package)
linux-image-gcp-64k (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-6.11.0-18-generic-64k (Ubuntu package)
linux-image-6.11.0-18-generic (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-6.11.0-1005-realtime (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-6.11.0-1008-raspi (Ubuntu package)
linux-image-6.11.0-1009-gcp (Ubuntu package)
linux-image-6.11.0-1009-azure (Ubuntu package)
linux-image-6.11.0-1009-azure-fde (Ubuntu package)
linux-image-6.11.0-1009-aws (Ubuntu package)
linux-image-6.11.0-1010-lowlatency (Ubuntu package)
linux-image-6.11.0-1010-lowlatency-64k (Ubuntu package)
linux-image-6.11.0-1011-oracle-64k (Ubuntu package)
linux-image-6.11.0-1011-oracle (Ubuntu package)
linux-image-6.11.0-1015-oem (Ubuntu package)
linux-image-oem-24.04b (Ubuntu package)

How to mitigate CVE-2024-50220

Install update from vendor's website.

Linux kernel - addressed in versions 6.11.7, 6.12
linux-image-realtime-hwe-24.04 (Ubuntu package) - addressed in versions Ubuntu Pro, 6.11.0-1005.5
linux-image-realtime (Ubuntu package) - addressed in versions Ubuntu Pro, 6.11.0-1005.5
linux-image-6.8.1-1020-realtime (Ubuntu package) - update to Ubuntu Pro
bpftool - update to 6.6.0-76.0.0.69
kernel - update to 6.6.0-76.0.0.69
python3-perf-debuginfo - update to 6.6.0-76.0.0.69
python3-perf - update to 6.6.0-76.0.0.69
perf-debuginfo - update to 6.6.0-76.0.0.69
perf - update to 6.6.0-76.0.0.69
kernel-tools-devel - update to 6.6.0-76.0.0.69
kernel-tools-debuginfo - update to 6.6.0-76.0.0.69
kernel-tools - update to 6.6.0-76.0.0.69
kernel-source - update to 6.6.0-76.0.0.69
kernel-headers - update to 6.6.0-76.0.0.69
kernel-devel - update to 6.6.0-76.0.0.69
kernel-debugsource - update to 6.6.0-76.0.0.69
kernel-debuginfo - update to 6.6.0-76.0.0.69
bpftool-debuginfo - update to 6.6.0-76.0.0.69
linux-image-virtual (Ubuntu package) - addressed in versions 6.8.0-58.60, 6.11.0-18.18
linux-image-kvm (Ubuntu package) - update to 6.8.0-58.60
linux-image-generic (Ubuntu package) - addressed in versions 6.8.0-58.60, 6.11.0-18.18
linux-image-generic-64k (Ubuntu package) - addressed in versions 6.8.0-58.60, 6.11.0-18.18
linux-image-generic-lpae (Ubuntu package) - update to 6.8.0-58.60
linux-image-lowlatency-64k (Ubuntu package) - addressed in versions 6.8.0-58.60.1, 6.11.0-1010.11
linux-image-lowlatency (Ubuntu package) - addressed in versions 6.8.0-58.60.1, 6.11.0-1010.11
linux-image-6.8.0-58-lowlatency-64k (Ubuntu package) - addressed in versions 6.8.0-58.60.1, 6.8.0-58.60.1~22.04.1
linux-image-6.8.0-58-lowlatency (Ubuntu package) - addressed in versions 6.8.0-58.60.1, 6.8.0-58.60.1~22.04.1
linux-image-6.8.0-58-generic-64k (Ubuntu package) - addressed in versions 6.8.0-58.60+1, 6.8.0-58.60~22.04.1
linux-image-6.8.0-58-generic (Ubuntu package) - addressed in versions 6.8.0-58.60+1, 6.8.0-58.60~22.04.1
linux-image-lowlatency-hwe-22.04 (Ubuntu package) - update to 6.8.0-58.60.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-58.60.1~22.04.1
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-oem-22.04 (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-oem-22.04a (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-oem-22.04b (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-oem-22.04c (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-oem-22.04d (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 6.8.0-58.60~22.04.1
linux-image-gkeop-6.8 (Ubuntu package) - update to 6.8.0-1010.12
linux-image-gkeop (Ubuntu package) - update to 6.8.0-1010.12
linux-image-6.8.0-1010-gkeop (Ubuntu package) - update to 6.8.0-1010.12
linux-image-azure-nvidia (Ubuntu package) - update to 6.8.0-1014.15
linux-image-6.8.0-1014-azure-nvidia (Ubuntu package) - update to 6.8.0-1014.15
linux-image-6.8.0-1023-gke (Ubuntu package) - update to 6.8.0-1023.27
linux-image-gke (Ubuntu package) - update to 6.8.0-1023.27
linux-image-ibm (Ubuntu package) - update to 6.8.0-1024.24
linux-image-ibm-classic (Ubuntu package) - update to 6.8.0-1024.24
linux-image-ibm-lts-24.04 (Ubuntu package) - update to 6.8.0-1024.24
linux-image-6.8.0-1024-ibm (Ubuntu package) - update to 6.8.0-1024.24
linux-image-oracle (Ubuntu package) - addressed in versions 6.8.0-1024.25, 6.8.0-1024.25~22.04.1, 6.11.0-1011.12
linux-image-oracle-64k-lts-24.04 (Ubuntu package) - update to 6.8.0-1024.25
linux-image-oracle-lts-24.04 (Ubuntu package) - update to 6.8.0-1024.25
linux-image-oracle-64k (Ubuntu package) - addressed in versions 6.8.0-1024.25, 6.8.0-1024.25~22.04.1, 6.11.0-1011.12
linux-image-6.8.0-1024-oracle-64k (Ubuntu package) - addressed in versions 6.8.0-1024.25, 6.8.0-1024.25~22.04.1
linux-image-6.8.0-1024-oracle (Ubuntu package) - addressed in versions 6.8.0-1024.25, 6.8.0-1024.25~22.04.1
linux-image-6.8.0-1026-oem (Ubuntu package) - update to 6.8.0-1026.26
linux-image-oem-24.04 (Ubuntu package) - addressed in versions 6.8.0-1026.26, 6.11.0-18.18
linux-image-oem-24.04a (Ubuntu package) - addressed in versions 6.8.0-1026.26, 6.11.0-18.18
linux-image-6.8.0-1026-nvidia (Ubuntu package) - addressed in versions 6.8.0-1026.29, 6.8.0-1026.29~22.04.1
linux-image-6.8.0-1026-nvidia-64k (Ubuntu package) - addressed in versions 6.8.0-1026.29, 6.8.0-1026.29~22.04.1
linux-image-nvidia-64k (Ubuntu package) - update to 6.8.0-1026.29
linux-image-nvidia (Ubuntu package) - update to 6.8.0-1026.29
linux-image-nvidia-lowlatency-64k (Ubuntu package) - update to 6.8.0-1026.29.1
linux-image-6.8.0-1026-nvidia-lowlatency-64k (Ubuntu package) - update to 6.8.0-1026.29.1
linux-image-6.8.0-1026-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1026.29.1
linux-image-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1026.29.1
linux-image-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1026.29~22.04.1
linux-image-nvidia-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-1026.29~22.04.1
linux-image-nvidia-64k-6.8 (Ubuntu package) - update to 6.8.0-1026.29~22.04.1
linux-image-nvidia-hwe-22.04 (Ubuntu package) - update to 6.8.0-1026.29~22.04.1
linux-image-6.8.0-1027-aws (Ubuntu package) - addressed in versions 6.8.0-1027.29, 6.8.0-1027.29~22.04.1
linux-image-aws (Ubuntu package) - addressed in versions 6.8.0-1027.29, 6.8.0-1027.29~22.04.1, 6.11.0-1009.10
linux-image-aws-lts-24.04 (Ubuntu package) - update to 6.8.0-1027.29
linux-image-azure-lts-24.04 (Ubuntu package) - update to 6.8.0-1027.32
linux-image-azure-fde-lts-24.04 (Ubuntu package) - update to 6.8.0-1027.32
linux-image-6.8.0-1027-azure (Ubuntu package) - addressed in versions 6.8.0-1027.32, 6.8.0-1027.32~22.04.1
linux-image-6.8.0-1027-azure-fde (Ubuntu package) - addressed in versions 6.8.0-1027.32, 6.8.0-1027.32~22.04.1
linux-image-azure-fde (Ubuntu package) - addressed in versions 6.8.0-1027.32~22.04.1, 6.11.0-1009.9
linux-image-azure (Ubuntu package) - addressed in versions 6.8.0-1027.32~22.04.1, 6.11.0-1009.9
linux-image-6.8.0-1028-gcp (Ubuntu package) - addressed in versions 6.8.0-1028.30, 6.8.0-1028.30~22.04.1
linux-image-6.8.0-1028-gcp-64k (Ubuntu package) - addressed in versions 6.8.0-1028.30, 6.8.0-1028.30~22.04.1
linux-image-gcp-64k-lts-24.04 (Ubuntu package) - update to 6.8.0-1028.30
linux-image-gcp-lts-24.04 (Ubuntu package) - update to 6.8.0-1028.30
linux-image-gcp-64k (Ubuntu package) - update to 6.8.0-1028.30~22.04.1
linux-image-gcp (Ubuntu package) - addressed in versions 6.8.0-1028.30~22.04.1, 6.11.0-1009.9
linux-image-6.11.0-18-generic-64k (Ubuntu package) - update to 6.11.0-18.18
linux-image-6.11.0-18-generic (Ubuntu package) - update to 6.11.0-18.18
linux-image-generic-64k-hwe-24.04 (Ubuntu package) - update to 6.11.0-18.18
linux-image-virtual-hwe-24.04 (Ubuntu package) - update to 6.11.0-18.18
linux-image-generic-hwe-24.04 (Ubuntu package) - update to 6.11.0-18.18
linux-image-6.11.0-1005-realtime (Ubuntu package) - update to 6.11.0-1005.5
linux-image-raspi (Ubuntu package) - update to 6.11.0-1008.8
linux-image-6.11.0-1008-raspi (Ubuntu package) - update to 6.11.0-1008.8
linux-image-6.11.0-1009-gcp (Ubuntu package) - update to 6.11.0-1009.9
linux-image-6.11.0-1009-azure (Ubuntu package) - update to 6.11.0-1009.9
linux-image-6.11.0-1009-azure-fde (Ubuntu package) - update to 6.11.0-1009.9
linux-image-6.11.0-1009-aws (Ubuntu package) - update to 6.11.0-1009.10
linux-image-6.11.0-1010-lowlatency (Ubuntu package) - update to 6.11.0-1010.11
linux-image-6.11.0-1010-lowlatency-64k (Ubuntu package) - update to 6.11.0-1010.11
linux-image-6.11.0-1011-oracle-64k (Ubuntu package) - update to 6.11.0-1011.12
linux-image-6.11.0-1011-oracle (Ubuntu package) - update to 6.11.0-1011.12
linux-image-6.11.0-1015-oem (Ubuntu package) - update to 6.11.0-1015.15
linux-image-oem-24.04b (Ubuntu package) - update to 6.11.0-1015.15

External References

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