Incorrect calculation in Linux kernel - CVE-2024-49988

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Main Vulnerability Database Vulnerabilities #VU99187

Incorrect calculation in Linux kernel - CVE-2024-49988

Published: October 22, 2024 / Updated: May 12, 2025


Vulnerability identifier: #VU99187
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-2024-49988
CWE-ID: CWE-682
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 incorrect calculation within the session_fd_check() and ksmbd_reopen_durable_fd() functions in fs/smb/server/vfs_cache.c, within the alloc_opinfo(), free_opinfo(), opinfo_get_list(), smb_send_parent_lease_break_noti(), smb_lazy_parent_lease_break_close(), smb_grant_oplock(), smb_break_all_write_oplock() and smb_break_all_levII_oplock() functions in fs/smb/server/oplock.c, within the ksmbd_conn_free() and ksmbd_conn_alloc() functions in fs/smb/server/connection.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Ubuntu
openEuler
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-6.8.0-54-generic (Ubuntu package)
linux-image-6.8.0-54-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-6.8.0-54-lowlatency (Ubuntu package)
linux-image-6.8.0-54-lowlatency-64k (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-oem-22.04d (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
linux-image-oem-22.04b (Ubuntu package)
linux-image-oem-22.04a (Ubuntu package)
linux-image-6.8.0-57-generic (Ubuntu package)
linux-image-6.8.0-57-generic-64k (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-oem-22.04 (Ubuntu package)
linux-image-6.8.0-1006-gkeop (Ubuntu package)
linux-image-gkeop (Ubuntu package)
linux-image-gkeop-6.8 (Ubuntu package)
linux-image-6.8.0-1014-azure-nvidia (Ubuntu package)
linux-image-azure-nvidia (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-6.8.0-1019-gke (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-6.8.0-1019-raspi (Ubuntu package)
linux-image-6.8.0-1020-oracle (Ubuntu package)
linux-image-oracle-lts-24.04 (Ubuntu package)
linux-image-oracle-64k-lts-24.04 (Ubuntu package)
linux-image-6.8.0-1020-oracle-64k (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-ibm-lts-24.04 (Ubuntu package)
linux-image-ibm-classic (Ubuntu package)
linux-image-6.8.0-1022-ibm (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-nvidia-64k (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-6.8.0-1022-nvidia-64k (Ubuntu package)
linux-image-6.8.0-1022-nvidia (Ubuntu package)
linux-image-6.8.0-1022-nvidia-lowlatency (Ubuntu package)
linux-image-6.8.0-1022-nvidia-lowlatency-64k (Ubuntu package)
linux-image-nvidia-lowlatency-64k (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia-hwe-22.04 (Ubuntu package)
linux-image-nvidia-64k-hwe-22.04 (Ubuntu package)
linux-image-nvidia-64k-6.8 (Ubuntu package)
linux-image-nvidia-6.8 (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-6.8.0-1023-aws (Ubuntu package)
linux-image-aws-lts-24.04 (Ubuntu package)
linux-image-oem-24.04 (Ubuntu package)
linux-image-6.8.0-1024-oem (Ubuntu package)
linux-image-oem-24.04a (Ubuntu package)
linux-image-6.8.0-1024-gcp (Ubuntu package)
linux-image-6.8.0-1024-gcp-64k (Ubuntu package)
linux-image-gcp (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-azure-fde-lts-24.04 (Ubuntu package)
linux-image-azure-lts-24.04 (Ubuntu package)
linux-image-6.8.0-1025-azure-fde (Ubuntu package)
linux-image-6.8.0-1025-azure (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-6.11.0-18-generic (Ubuntu package)
linux-image-6.11.0-18-generic-64k (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-realtime (Ubuntu package)
linux-image-6.11.0-1005-realtime (Ubuntu package)
linux-image-realtime-hwe-24.04 (Ubuntu package)
linux-image-6.11.0-1008-raspi (Ubuntu package)
linux-image-6.11.0-1009-azure-fde (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-aws (Ubuntu package)
linux-image-6.11.0-1010-lowlatency-64k (Ubuntu package)
linux-image-6.11.0-1010-lowlatency (Ubuntu package)
linux-image-6.11.0-1011-oracle-64k (Ubuntu package)
linux-image-6.11.0-1011-oracle (Ubuntu package)
linux-image-oem-24.04b (Ubuntu package)
linux-image-6.11.0-1015-oem (Ubuntu package)

How to mitigate CVE-2024-49988

Install update from vendor's website.

Linux kernel - addressed in versions 6.6.55, 6.10.14, 6.11.3, 6.12
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-6.8.0-54-generic (Ubuntu package) - update to 6.8.0-54.56
linux-image-6.8.0-54-generic-64k (Ubuntu package) - update to 6.8.0-54.56
linux-image-generic (Ubuntu package) - addressed in versions 6.8.0-54.56, 6.11.0-18.18
linux-image-generic-64k (Ubuntu package) - addressed in versions 6.8.0-54.56, 6.11.0-18.18
linux-image-generic-lpae (Ubuntu package) - update to 6.8.0-54.56
linux-image-kvm (Ubuntu package) - update to 6.8.0-54.56
linux-image-virtual (Ubuntu package) - addressed in versions 6.8.0-54.56, 6.11.0-18.18
linux-image-6.8.0-54-lowlatency (Ubuntu package) - addressed in versions 6.8.0-54.56.1, 6.8.0-54.56.1~22.04.1
linux-image-6.8.0-54-lowlatency-64k (Ubuntu package) - addressed in versions 6.8.0-54.56.1, 6.8.0-54.56.1~22.04.1
linux-image-lowlatency-64k (Ubuntu package) - addressed in versions 6.8.0-54.56.1, 6.11.0-1010.11
linux-image-lowlatency (Ubuntu package) - addressed in versions 6.8.0-54.56.1, 6.11.0-1010.11
linux-image-lowlatency-hwe-22.04 (Ubuntu package) - update to 6.8.0-54.56.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-54.56.1~22.04.1
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-oem-22.04d (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-oem-22.04c (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-oem-22.04b (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-oem-22.04a (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-6.8.0-57-generic (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-6.8.0-57-generic-64k (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-oem-22.04 (Ubuntu package) - update to 6.8.0-57.59~22.04.1
linux-image-6.8.0-1006-gkeop (Ubuntu package) - update to 6.8.0-1006.8
linux-image-gkeop (Ubuntu package) - update to 6.8.0-1006.8
linux-image-gkeop-6.8 (Ubuntu package) - update to 6.8.0-1006.8
linux-image-6.8.0-1014-azure-nvidia (Ubuntu package) - update to 6.8.0-1014.15
linux-image-azure-nvidia (Ubuntu package) - update to 6.8.0-1014.15
linux-image-gke (Ubuntu package) - update to 6.8.0-1019.23
linux-image-6.8.0-1019-gke (Ubuntu package) - update to 6.8.0-1019.23
linux-image-raspi (Ubuntu package) - addressed in versions 6.8.0-1019.23, 6.11.0-1008.8
linux-image-6.8.0-1019-raspi (Ubuntu package) - update to 6.8.0-1019.23
linux-image-6.8.0-1020-oracle (Ubuntu package) - addressed in versions 6.8.0-1020.21, 6.8.0-1020.21~22.04.1
linux-image-oracle-lts-24.04 (Ubuntu package) - update to 6.8.0-1020.21
linux-image-oracle-64k-lts-24.04 (Ubuntu package) - update to 6.8.0-1020.21
linux-image-6.8.0-1020-oracle-64k (Ubuntu package) - addressed in versions 6.8.0-1020.21, 6.8.0-1020.21~22.04.1
linux-image-oracle-64k (Ubuntu package) - addressed in versions 6.8.0-1020.21, 6.8.0-1020.21~22.04.1, 6.11.0-1011.12
linux-image-oracle (Ubuntu package) - addressed in versions 6.8.0-1020.21, 6.8.0-1020.21~22.04.1, 6.11.0-1011.12
linux-image-ibm-lts-24.04 (Ubuntu package) - update to 6.8.0-1022.22
linux-image-ibm-classic (Ubuntu package) - update to 6.8.0-1022.22
linux-image-6.8.0-1022-ibm (Ubuntu package) - update to 6.8.0-1022.22
linux-image-ibm (Ubuntu package) - update to 6.8.0-1022.22
linux-image-nvidia-64k (Ubuntu package) - update to 6.8.0-1022.25
linux-image-nvidia (Ubuntu package) - update to 6.8.0-1022.25
linux-image-6.8.0-1022-nvidia-64k (Ubuntu package) - addressed in versions 6.8.0-1022.25, 6.8.0-1022.25~22.04.2
linux-image-6.8.0-1022-nvidia (Ubuntu package) - addressed in versions 6.8.0-1022.25, 6.8.0-1022.25~22.04.2
linux-image-6.8.0-1022-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1022.25.2
linux-image-6.8.0-1022-nvidia-lowlatency-64k (Ubuntu package) - update to 6.8.0-1022.25.2
linux-image-nvidia-lowlatency-64k (Ubuntu package) - update to 6.8.0-1022.25.2
linux-image-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1022.25.2
linux-image-nvidia-hwe-22.04 (Ubuntu package) - update to 6.8.0-1022.25~22.04.2
linux-image-nvidia-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-1022.25~22.04.2
linux-image-nvidia-64k-6.8 (Ubuntu package) - update to 6.8.0-1022.25~22.04.2
linux-image-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1022.25~22.04.2
linux-image-aws (Ubuntu package) - addressed in versions 6.8.0-1023.25, 6.8.0-1023.25~22.04.1, 6.11.0-1009.10
linux-image-6.8.0-1023-aws (Ubuntu package) - addressed in versions 6.8.0-1023.25, 6.8.0-1023.25~22.04.1
linux-image-aws-lts-24.04 (Ubuntu package) - update to 6.8.0-1023.25
linux-image-oem-24.04 (Ubuntu package) - addressed in versions 6.8.0-1024.24, 6.11.0-18.18
linux-image-6.8.0-1024-oem (Ubuntu package) - update to 6.8.0-1024.24
linux-image-oem-24.04a (Ubuntu package) - addressed in versions 6.8.0-1024.24, 6.11.0-18.18
linux-image-6.8.0-1024-gcp (Ubuntu package) - addressed in versions 6.8.0-1024.26, 6.8.0-1024.26~22.04.1
linux-image-6.8.0-1024-gcp-64k (Ubuntu package) - addressed in versions 6.8.0-1024.26, 6.8.0-1024.26~22.04.1
linux-image-gcp (Ubuntu package) - addressed in versions 6.8.0-1024.26, 6.8.0-1024.26~22.04.1, 6.11.0-1009.9
linux-image-gcp-64k-lts-24.04 (Ubuntu package) - update to 6.8.0-1024.26
linux-image-gcp-lts-24.04 (Ubuntu package) - update to 6.8.0-1024.26
linux-image-gcp-64k (Ubuntu package) - addressed in versions 6.8.0-1024.26, 6.8.0-1024.26~22.04.1
linux-image-azure-fde-lts-24.04 (Ubuntu package) - update to 6.8.0-1025.30
linux-image-azure-lts-24.04 (Ubuntu package) - update to 6.8.0-1025.30
linux-image-6.8.0-1025-azure-fde (Ubuntu package) - update to 6.8.0-1025.30~22.04.1
linux-image-6.8.0-1025-azure (Ubuntu package) - update to 6.8.0-1025.30~22.04.1
linux-image-azure (Ubuntu package) - addressed in versions 6.8.0-1025.30~22.04.1, 6.11.0-1009.9
linux-image-azure-fde (Ubuntu package) - addressed in versions 6.8.0-1025.30~22.04.1, 6.11.0-1009.9
linux-image-6.11.0-18-generic (Ubuntu package) - update to 6.11.0-18.18
linux-image-6.11.0-18-generic-64k (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-generic-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-realtime (Ubuntu package) - update to 6.11.0-1005.5
linux-image-6.11.0-1005-realtime (Ubuntu package) - update to 6.11.0-1005.5
linux-image-realtime-hwe-24.04 (Ubuntu package) - update to 6.11.0-1005.5
linux-image-6.11.0-1008-raspi (Ubuntu package) - update to 6.11.0-1008.8
linux-image-6.11.0-1009-azure-fde (Ubuntu package) - update to 6.11.0-1009.9
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-aws (Ubuntu package) - update to 6.11.0-1009.10
linux-image-6.11.0-1010-lowlatency-64k (Ubuntu package) - update to 6.11.0-1010.11
linux-image-6.11.0-1010-lowlatency (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-oem-24.04b (Ubuntu package) - update to 6.11.0-1015.15
linux-image-6.11.0-1015-oem (Ubuntu package) - update to 6.11.0-1015.15

External References

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