Race condition in Linux kernel - CVE-2023-32254

Vulnerability identifier: #VU77498

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-32254

CWE-ID: CWE-362

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to a race condition within fs/ksmbd/mgmt/tree_connect.c in ksmbd in Linux kernel when processing SMB2_TREE_DISCONNECT commands. A remote attacker can trigger a use-after-free error using concurrent smb2 tree disconnect requests and execute arbitrary code on the system.

Linux kernel
Debian Linux
Ubuntu
openEuler
kernel-tools-devel
python3-perf-debuginfo
kernel-source
bpftool
python3-perf
kernel-debugsource
perf
kernel-tools
kernel-devel
kernel-tools-debuginfo
perf-debuginfo
kernel-debuginfo
bpftool-debuginfo
kernel-headers
kernel
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-virtual-hwe-20.04 (Ubuntu package)
linux-image-oem-20.04d (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-64k (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-5.15 (Ubuntu package)
linux-image-gkeop (Ubuntu package)
linux-image-5.15.0-1040-gkeop (Ubuntu package)
linux-image-5.15.0-1048-nvidia-lowlatency (Ubuntu package)
linux-image-5.15.0-1048-nvidia (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-raspi (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-gke (Ubuntu package)
linux-image-5.15.0-1054-kvm (Ubuntu package)
linux-image-oracle-lts-22.04 (Ubuntu package)
linux-image-gcp-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1055-oracle (Ubuntu package)
linux-image-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-cvm (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure-fde-lts-22.04 (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
linux-image-6.1.0-1014-oem (Ubuntu package)
linux (Debian package)
linux-image-6.2.0-27-generic-lpae (Ubuntu package)
linux-image-6.2.0-27-generic (Ubuntu package)
linux-image-6.2.0-27-generic-64k (Ubuntu package)
linux-image-6.2.0-1007-ibm (Ubuntu package)
linux-image-6.2.0-1009-aws (Ubuntu package)
linux-image-6.2.0-1009-azure (Ubuntu package)
linux-image-6.2.0-1009-oracle (Ubuntu package)
linux-image-6.2.0-1010-lowlatency-64k (Ubuntu package)
linux-image-6.2.0-1010-kvm (Ubuntu package)
linux-image-6.2.0-1010-lowlatency (Ubuntu package)
linux-image-6.2.0-1010-raspi (Ubuntu package)
linux-image-6.2.0-1011-gcp (Ubuntu package)
linux-image-intel-iotg (Ubuntu package)
linux-image-intel (Ubuntu package)

Install updates from vendor's website.

Linux kernel - update to 6.4 rc1
kernel-tools-devel - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
python3-perf-debuginfo - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel-source - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
bpftool - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
python3-perf - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel-debugsource - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
perf - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel-tools - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel-devel - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel-tools-debuginfo - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
perf-debuginfo - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel-debuginfo - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
bpftool-debuginfo - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel-headers - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
kernel - addressed in versions 5.10.0-60.115.0.142, 5.10.0-136.53.0.132, 5.10.0-153.31.0.108
linux-image-lowlatency-64k (Ubuntu package) - addressed in versions 5.15.0.102.98, 6.2.0.1010.10
linux-image-lowlatency (Ubuntu package) - addressed in versions 5.15.0.102.98, 6.2.0.1010.10
linux-image-generic-lpae (Ubuntu package) - addressed in versions 5.15.0.102.99, 6.2.0.27.27
linux-image-generic (Ubuntu package) - addressed in versions 5.15.0.102.99, 6.2.0.27.27
linux-image-generic-64k (Ubuntu package) - addressed in versions 5.15.0.102.99, 6.2.0.27.27
linux-image-virtual (Ubuntu package) - addressed in versions 5.15.0.102.99, 6.2.0.27.27
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-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-64k (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-5.15 (Ubuntu package) - addressed in versions 5.15.0.1040.39, 5.15.0.1040.46~20.04.36
linux-image-gkeop (Ubuntu package) - update to 5.15.0.1040.39
linux-image-5.15.0-1040-gkeop (Ubuntu package) - update to 5.15.0-1040.46~20.04.1
linux-image-5.15.0-1048-nvidia-lowlatency (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-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-ibm (Ubuntu package) - addressed in versions 5.15.0.1050.46, 5.15.0.1050.53~20.04.1, 6.2.0.1007.7
linux-image-raspi-nolpae (Ubuntu package) - addressed in versions 5.15.0.1050.48, 6.2.0.1010.13
linux-image-raspi (Ubuntu package) - addressed in versions 5.15.0.1050.48, 6.2.0.1010.13
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-intel (Ubuntu package) - update to 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-kvm (Ubuntu package) - addressed in versions 5.15.0.1054.50, 6.2.0.1010.10
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-gke (Ubuntu package) - update to 5.15.0-1054.59
linux-image-5.15.0-1054-kvm (Ubuntu package) - update to 5.15.0-1054.59
linux-image-oracle-lts-22.04 (Ubuntu package) - update to 5.15.0.1055.51
linux-image-gcp-lts-22.04 (Ubuntu package) - update to 5.15.0.1055.51
linux-image-5.15.0-1055-oracle (Ubuntu package) - update to 5.15.0-1055.61~20.04.1
linux-image-oracle (Ubuntu package) - addressed in versions 5.15.0.1055.61~20.04.1, 6.2.0.1009.9
linux-image-5.15.0-1055-gcp (Ubuntu package) - update to 5.15.0-1055.63~20.04.1
linux-image-gcp (Ubuntu package) - addressed in versions 5.15.0.1055.63~20.04.1, 6.2.0.1011.11
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) - addressed in versions 5.15.0.1057.63~20.04.1, 6.2.0.1009.10
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-cvm (Ubuntu package) - update to 5.15.0.1060.69~20.04.1
linux-image-azure (Ubuntu package) - addressed in versions 5.15.0.1060.69~20.04.1, 6.2.0.1009.9
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
linux-image-oem-22.04c (Ubuntu package) - update to 6.1.0.1014.14
linux-image-6.1.0-1014-oem (Ubuntu package) - update to 6.1.0-1014.14
linux (Debian package) - update to 6.1.37-1
linux-image-6.2.0-27-generic-lpae (Ubuntu package) - update to 6.2.0-27.28
linux-image-6.2.0-27-generic (Ubuntu package) - update to 6.2.0-27.28
linux-image-6.2.0-27-generic-64k (Ubuntu package) - update to 6.2.0-27.28
linux-image-6.2.0-1007-ibm (Ubuntu package) - update to 6.2.0-1007.7
linux-image-6.2.0-1009-aws (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1009-azure (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1009-oracle (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1010-lowlatency-64k (Ubuntu package) - update to 6.2.0-1010.10
linux-image-6.2.0-1010-kvm (Ubuntu package) - update to 6.2.0-1010.10
linux-image-6.2.0-1010-lowlatency (Ubuntu package) - update to 6.2.0-1010.10
linux-image-6.2.0-1010-raspi (Ubuntu package) - update to 6.2.0-1010.12
linux-image-6.2.0-1011-gcp (Ubuntu package) - update to 6.2.0-1011.11

• https://www.zerodayinitiative.com/advisories/ZDI-23-702/
• https://github.com/torvalds/linux/commit/30210947a343b6b3ca13adc9bfc88e1543e16dd5
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=30210947a343b6b3ca13adc9bfc88e1543e16dd5

• Remote code execution in Linux kernel ksmbd
• Ubuntu update for linux-oem-6.1
• Debian update for linux
• Ubuntu update for linux
• openEuler 22.03 LTS update for kernel
• openEuler 22.03 LTS SP1 update for kernel
• openEuler 22.03 LTS SP2 update for kernel
• Ubuntu update for linux
• Ubuntu update for linux-aws