Use-after-free in Linux kernel - CVE-2023-52480

Vulnerability identifier: #VU90249

CSH Severity: Low

CVSS v4 BT: 5.9 [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/E:U/U:Clear]

CVE-ID: CVE-2023-52480

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to a use-after-free error within the ksmbd_expire_session(), ksmbd_sessions_deregister() and ksmbd_session_lookup() functions in fs/ksmbd/mgmt/user_session.c, within the ksmbd_conn_alloc() function in fs/ksmbd/connection.c. A local user can escalate privileges on the system.

Linux kernel
Ubuntu
openEuler
perf-debuginfo
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
python3-perf
python3-perf-debuginfo
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-virtual-hwe-20.04 (Ubuntu package)
linux-image-oem-20.04d (Ubuntu package)
linux-image-5.15.0-102-generic-64k (Ubuntu package)
linux-image-oem-20.04c (Ubuntu package)
linux-image-oem-20.04b (Ubuntu package)
linux-image-oem-20.04 (Ubuntu package)
linux-image-lowlatency-hwe-20.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-20.04 (Ubuntu package)
linux-image-generic-lpae-hwe-20.04 (Ubuntu package)
linux-image-generic-hwe-20.04 (Ubuntu package)
linux-image-generic-64k-hwe-20.04 (Ubuntu package)
linux-image-5.15.0-102-generic (Ubuntu package)
linux-image-5.15.0-102-generic-lpae (Ubuntu package)
linux-image-5.15.0-102-lowlatency (Ubuntu package)
linux-image-5.15.0-102-lowlatency-64k (Ubuntu package)
linux-image-gkeop (Ubuntu package)
linux-image-gkeop-5.15 (Ubuntu package)
linux-image-5.15.0-1040-gkeop (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-5.15.0-1048-nvidia (Ubuntu package)
linux-image-5.15.0-1048-nvidia-lowlatency (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-5.15.0-1050-raspi (Ubuntu package)
linux-image-5.15.0-1050-ibm (Ubuntu package)
linux-image-5.15.0-1052-intel-iotg (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-gke-5.15 (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-5.15.0-1054-kvm (Ubuntu package)
linux-image-5.15.0-1054-gke (Ubuntu package)
linux-image-gcp-lts-22.04 (Ubuntu package)
linux-image-oracle-lts-22.04 (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-5.15.0-1055-oracle (Ubuntu package)
linux-image-5.15.0-1055-gcp (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-aws-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1057-aws (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-azure-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1060-azure-fde (Ubuntu package)
linux-image-5.15.0-1060-azure (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-cvm (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure-fde-lts-22.04 (Ubuntu package)
linux-image-intel-iotg (Ubuntu package)
linux-image-intel (Ubuntu package)

Install update from vendor's website.

Linux kernel - addressed in versions 5.15.145, 6.1.57, 6.5.7, 6.6
perf-debuginfo - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
bpftool - update to 5.10.0-248.0.0.147
bpftool-debuginfo - update to 5.10.0-248.0.0.147
kernel-debuginfo - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel-debugsource - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel-devel - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel-headers - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel-source - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel-tools - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel-tools-debuginfo - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
kernel-tools-devel - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
perf - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
python3-perf - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
python3-perf-debuginfo - addressed in versions 5.10.0-248.0.0.147, 5.10.0-248.0.0.150
linux-image-lowlatency (Ubuntu package) - update to 5.15.0.102.98
linux-image-lowlatency-64k (Ubuntu package) - update to 5.15.0.102.98
linux-image-virtual (Ubuntu package) - update to 5.15.0.102.99
linux-image-generic-64k (Ubuntu package) - update to 5.15.0.102.99
linux-image-generic-lpae (Ubuntu package) - update to 5.15.0.102.99
linux-image-generic (Ubuntu package) - update to 5.15.0.102.99
linux-image-virtual-hwe-20.04 (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-oem-20.04d (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-5.15.0-102-generic-64k (Ubuntu package) - update to 5.15.0-102.112~20.04.1
linux-image-oem-20.04c (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-oem-20.04b (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-oem-20.04 (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-lowlatency-hwe-20.04 (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-lowlatency-64k-hwe-20.04 (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-generic-lpae-hwe-20.04 (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-generic-hwe-20.04 (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-generic-64k-hwe-20.04 (Ubuntu package) - update to 5.15.0.102.112~20.04.1
linux-image-5.15.0-102-generic (Ubuntu package) - update to 5.15.0-102.112~20.04.1
linux-image-5.15.0-102-generic-lpae (Ubuntu package) - update to 5.15.0-102.112~20.04.1
linux-image-5.15.0-102-lowlatency (Ubuntu package) - update to 5.15.0-102.112~20.04.1
linux-image-5.15.0-102-lowlatency-64k (Ubuntu package) - update to 5.15.0-102.112~20.04.1
linux-image-gkeop (Ubuntu package) - update to 5.15.0.1040.39
linux-image-gkeop-5.15 (Ubuntu package) - addressed in versions 5.15.0.1040.39, 5.15.0.1040.46~20.04.36
linux-image-5.15.0-1040-gkeop (Ubuntu package) - update to 5.15.0-1040.46~20.04.1
linux-image-nvidia-lowlatency (Ubuntu package) - update to 5.15.0.1048.48
linux-image-nvidia (Ubuntu package) - update to 5.15.0.1048.48
linux-image-5.15.0-1048-nvidia (Ubuntu package) - update to 5.15.0-1048.48
linux-image-5.15.0-1048-nvidia-lowlatency (Ubuntu package) - update to 5.15.0-1048.48
linux-image-ibm (Ubuntu package) - addressed in versions 5.15.0.1050.46, 5.15.0.1050.53~20.04.1
linux-image-raspi (Ubuntu package) - update to 5.15.0.1050.48
linux-image-raspi-nolpae (Ubuntu package) - update to 5.15.0.1050.48
linux-image-5.15.0-1050-raspi (Ubuntu package) - update to 5.15.0-1050.53
linux-image-5.15.0-1050-ibm (Ubuntu package) - update to 5.15.0-1050.53~20.04.1
linux-image-intel-iotg (Ubuntu package) - addressed in versions 5.15.0.1052.52, 5.15.0.1052.58~20.04.1
linux-image-5.15.0-1052-intel-iotg (Ubuntu package) - update to 5.15.0-1052.58~20.04.1
linux-image-intel (Ubuntu package) - update to 5.15.0.1052.58~20.04.1
linux-image-kvm (Ubuntu package) - update to 5.15.0.1054.50
linux-image-gke-5.15 (Ubuntu package) - update to 5.15.0.1054.53
linux-image-gke (Ubuntu package) - update to 5.15.0.1054.53
linux-image-5.15.0-1054-kvm (Ubuntu package) - update to 5.15.0-1054.59
linux-image-5.15.0-1054-gke (Ubuntu package) - update to 5.15.0-1054.59
linux-image-gcp-lts-22.04 (Ubuntu package) - update to 5.15.0.1055.51
linux-image-oracle-lts-22.04 (Ubuntu package) - update to 5.15.0.1055.51
linux-image-oracle (Ubuntu package) - update to 5.15.0.1055.61~20.04.1
linux-image-5.15.0-1055-oracle (Ubuntu package) - update to 5.15.0-1055.61~20.04.1
linux-image-5.15.0-1055-gcp (Ubuntu package) - update to 5.15.0-1055.63~20.04.1
linux-image-gcp (Ubuntu package) - update to 5.15.0.1055.63~20.04.1
linux-image-aws-lts-22.04 (Ubuntu package) - update to 5.15.0.1057.58
linux-image-5.15.0-1057-aws (Ubuntu package) - update to 5.15.0-1057.63~20.04.1
linux-image-aws (Ubuntu package) - update to 5.15.0.1057.63~20.04.1
linux-image-azure-lts-22.04 (Ubuntu package) - update to 5.15.0.1060.58
linux-image-5.15.0-1060-azure-fde (Ubuntu package) - addressed in versions 5.15.0-1060.69.1, 5.15.0-1060.69~20.04.1.1
linux-image-5.15.0-1060-azure (Ubuntu package) - update to 5.15.0-1060.69~20.04.1
linux-image-azure (Ubuntu package) - update to 5.15.0.1060.69~20.04.1
linux-image-azure-cvm (Ubuntu package) - update to 5.15.0.1060.69~20.04.1
linux-image-azure-fde (Ubuntu package) - update to 5.15.0.1060.69~20.04.1.39
linux-image-azure-fde-lts-22.04 (Ubuntu package) - update to 5.15.0.1060.69.38

• https://git.kernel.org/stable/c/c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f
• https://git.kernel.org/stable/c/a2ca5fd3dbcc665e1169044fa0c9e3eba779202b
• https://git.kernel.org/stable/c/18ced78b0ebccc2d16f426143dc56ab3aad666be
• https://git.kernel.org/stable/c/53ff5cf89142b978b1a5ca8dc4d4425e6a09745f
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.145
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.57
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.7
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6

• Use-after-free in Linux kernel ksmbd
• Ubuntu update for linux
• Ubuntu update for linux-aws
• openEuler 22.03 LTS SP4 update for kernel
• openEuler 22.03 LTS SP3 update for kernel