Out-of-bounds read in Linux kernel - CVE-2023-38426

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Main Vulnerability Database Vulnerabilities #VU80499

Out-of-bounds read in Linux kernel - CVE-2023-38426

Published: September 6, 2023


Vulnerability identifier: #VU80499
CSH Severity: Medium
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-38426
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the smb2_find_context_vals() function. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.


Affected software

Linux kernel
Ubuntu
openEuler
kernel-tools
kernel
perf-debuginfo
kernel-headers
python3-perf-debuginfo
bpftool-debuginfo
kernel-devel
kernel-source
bpftool
kernel-debuginfo
perf
kernel-tools-debuginfo
kernel-tools-devel
python3-perf
kernel-debugsource
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-5.15.0-83-generic (Ubuntu package)
linux-image-5.15.0-83-generic-64k (Ubuntu package)
linux-image-5.15.0-83-lowlatency-64k (Ubuntu package)
linux-image-5.15.0-83-lowlatency (Ubuntu package)
linux-image-5.15.0-83-generic-lpae (Ubuntu package)
linux-image-lowlatency-hwe-20.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-20.04 (Ubuntu package)
linux-image-generic-hwe-20.04 (Ubuntu package)
linux-image-generic-64k-hwe-20.04 (Ubuntu package)
linux-image-generic-lpae-hwe-20.04 (Ubuntu package)
linux-image-oem-20.04 (Ubuntu package)
linux-image-oem-20.04b (Ubuntu package)
linux-image-oem-20.04c (Ubuntu package)
linux-image-oem-20.04d (Ubuntu package)
linux-image-virtual-hwe-20.04 (Ubuntu package)
linux-image-gkeop-5.15 (Ubuntu package)
linux-image-gkeop (Ubuntu package)
linux-image-5.15.0-1027-gkeop (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-5.15.0-1032-nvidia (Ubuntu package)
linux-image-5.15.0-1032-nvidia-lowlatency (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-5.15.0-1037-ibm (Ubuntu package)
linux-image-5.15.0-1037-raspi (Ubuntu package)
linux-image-5.15.0-1039-intel-iotg (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-gcp-lts-22.04 (Ubuntu package)
linux-image-gke-5.15 (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-5.15.0-1041-gke (Ubuntu package)
linux-image-5.15.0-1041-kvm (Ubuntu package)
linux-image-5.15.0-1041-gcp (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-oracle-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1042-oracle (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-aws-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1044-aws (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-azure-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1046-azure (Ubuntu package)
linux-image-5.15.0-1046-azure-fde (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure-cvm (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-fde-lts-22.04 (Ubuntu package)
linux-image-6.2.0-32-generic (Ubuntu package)
linux-image-6.2.0-32-generic-64k (Ubuntu package)
linux-image-6.2.0-32-generic-lpae (Ubuntu package)
linux-image-generic-lpae-hwe-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-6.2.0-1004-starfive (Ubuntu package)
linux-image-starfive (Ubuntu package)
linux-image-6.2.0-1009-ibm (Ubuntu package)
linux-image-6.2.0-1011-oracle (Ubuntu package)
linux-image-6.2.0-1011-azure (Ubuntu package)
linux-image-6.2.0-1011-aws (Ubuntu package)
linux-image-6.2.0-1012-kvm (Ubuntu package)
linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package)
linux-image-6.2.0-1012-lowlatency (Ubuntu package)
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-hwe-22.04 (Ubuntu package)
linux-image-6.2.0-1012-raspi (Ubuntu package)
linux-image-6.2.0-1013-gcp (Ubuntu package)
linux-image-intel-iotg (Ubuntu package)

How to mitigate CVE-2023-38426

Install updates from vendor's website.

Linux kernel - update to 6.3.4
kernel-tools - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
perf-debuginfo - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel-headers - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
python3-perf-debuginfo - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
bpftool-debuginfo - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel-devel - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel-source - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
bpftool - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel-debuginfo - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
perf - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel-tools-debuginfo - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel-tools-devel - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
python3-perf - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
kernel-debugsource - addressed in versions 5.10.0-60.105.0.132, 5.10.0-136.43.0.121, 5.10.0-153.21.0.97
linux-image-generic-64k (Ubuntu package) - addressed in versions 5.15.0.83.80, 6.2.0.32.32
linux-image-generic (Ubuntu package) - addressed in versions 5.15.0.83.80, 6.2.0.32.32
linux-image-generic-lpae (Ubuntu package) - addressed in versions 5.15.0.83.80, 6.2.0.32.32
linux-image-virtual (Ubuntu package) - addressed in versions 5.15.0.83.80, 6.2.0.32.32
linux-image-lowlatency (Ubuntu package) - addressed in versions 5.15.0.83.85, 6.2.0.1012.12
linux-image-lowlatency-64k (Ubuntu package) - addressed in versions 5.15.0.83.85, 6.2.0.1012.12
linux-image-5.15.0-83-generic (Ubuntu package) - update to 5.15.0-83.92~20.04.1
linux-image-5.15.0-83-generic-64k (Ubuntu package) - update to 5.15.0-83.92~20.04.1
linux-image-5.15.0-83-lowlatency-64k (Ubuntu package) - update to 5.15.0-83.92~20.04.1
linux-image-5.15.0-83-lowlatency (Ubuntu package) - update to 5.15.0-83.92~20.04.1
linux-image-5.15.0-83-generic-lpae (Ubuntu package) - update to 5.15.0-83.92~20.04.1
linux-image-lowlatency-hwe-20.04 (Ubuntu package) - update to 5.15.0.83.92~20.04.38
linux-image-lowlatency-64k-hwe-20.04 (Ubuntu package) - update to 5.15.0.83.92~20.04.38
linux-image-generic-hwe-20.04 (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-generic-64k-hwe-20.04 (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-generic-lpae-hwe-20.04 (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-oem-20.04 (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-oem-20.04b (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-oem-20.04c (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-oem-20.04d (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-virtual-hwe-20.04 (Ubuntu package) - update to 5.15.0.83.92~20.04.41
linux-image-gkeop-5.15 (Ubuntu package) - addressed in versions 5.15.0.1027.26, 5.15.0.1027.32~20.04.23
linux-image-gkeop (Ubuntu package) - update to 5.15.0.1027.26
linux-image-5.15.0-1027-gkeop (Ubuntu package) - addressed in versions 5.15.0-1027.32, 5.15.0-1027.32~20.04.1
linux-image-nvidia (Ubuntu package) - update to 5.15.0.1032.32
linux-image-nvidia-lowlatency (Ubuntu package) - update to 5.15.0.1032.32
linux-image-5.15.0-1032-nvidia (Ubuntu package) - update to 5.15.0-1032.32
linux-image-5.15.0-1032-nvidia-lowlatency (Ubuntu package) - update to 5.15.0-1032.32
linux-image-ibm (Ubuntu package) - addressed in versions 5.15.0.1037.33, 5.15.0.1037.40~20.04.9, 6.2.0.1009.9
linux-image-raspi (Ubuntu package) - addressed in versions 5.15.0.1037.35, 6.2.0.1012.15
linux-image-raspi-nolpae (Ubuntu package) - addressed in versions 5.15.0.1037.35, 6.2.0.1012.15
linux-image-5.15.0-1037-ibm (Ubuntu package) - addressed in versions 5.15.0-1037.40, 5.15.0-1037.40~20.04.1
linux-image-5.15.0-1037-raspi (Ubuntu package) - update to 5.15.0-1037.40
linux-image-intel-iotg (Ubuntu package) - update to 5.15.0.1039.39
linux-image-5.15.0-1039-intel-iotg (Ubuntu package) - update to 5.15.0-1039.45
linux-image-kvm (Ubuntu package) - addressed in versions 5.15.0.1041.37, 6.2.0.1012.12
linux-image-gcp-lts-22.04 (Ubuntu package) - update to 5.15.0.1041.37
linux-image-gke-5.15 (Ubuntu package) - update to 5.15.0.1041.40
linux-image-gke (Ubuntu package) - update to 5.15.0.1041.40
linux-image-5.15.0-1041-gke (Ubuntu package) - update to 5.15.0-1041.46
linux-image-5.15.0-1041-kvm (Ubuntu package) - update to 5.15.0-1041.46
linux-image-5.15.0-1041-gcp (Ubuntu package) - addressed in versions 5.15.0-1041.49, 5.15.0-1041.49~20.04.1
linux-image-gcp (Ubuntu package) - addressed in versions 5.15.0.1041.49~20.04.1, 6.2.0.1013.13, 6.2.0.1013.13~22.04.1
linux-image-oracle-lts-22.04 (Ubuntu package) - update to 5.15.0.1042.37
linux-image-5.15.0-1042-oracle (Ubuntu package) - addressed in versions 5.15.0-1042.48, 5.15.0-1042.48~20.04.1
linux-image-oracle (Ubuntu package) - addressed in versions 5.15.0.1042.48~20.04.1, 6.2.0.1011.11
linux-image-aws-lts-22.04 (Ubuntu package) - update to 5.15.0.1044.43
linux-image-5.15.0-1044-aws (Ubuntu package) - addressed in versions 5.15.0-1044.49, 5.15.0-1044.49~20.04.1
linux-image-aws (Ubuntu package) - addressed in versions 5.15.0.1044.49~20.04.32, 6.2.0.1011.11~22.04.1, 6.2.0.1011.12
linux-image-azure-lts-22.04 (Ubuntu package) - update to 5.15.0.1046.42
linux-image-5.15.0-1046-azure (Ubuntu package) - addressed in versions 5.15.0-1046.53, 5.15.0-1046.53~20.04.1
linux-image-5.15.0-1046-azure-fde (Ubuntu package) - addressed in versions 5.15.0-1046.53.1, 5.15.0-1046.53~20.04.1.1
linux-image-azure-fde (Ubuntu package) - update to 5.15.0.1046.53~20.04.1.24
linux-image-azure-cvm (Ubuntu package) - update to 5.15.0.1046.53~20.04.35
linux-image-azure (Ubuntu package) - addressed in versions 5.15.0.1046.53~20.04.35, 6.2.0.1011.11
linux-image-azure-fde-lts-22.04 (Ubuntu package) - update to 5.15.0.1046.53.24
linux-image-6.2.0-32-generic (Ubuntu package) - update to 6.2.0-32.32~22.04.1
linux-image-6.2.0-32-generic-64k (Ubuntu package) - update to 6.2.0-32.32~22.04.1
linux-image-6.2.0-32-generic-lpae (Ubuntu package) - update to 6.2.0-32.32~22.04.1
linux-image-generic-lpae-hwe-22.04 (Ubuntu package) - update to 6.2.0.32.32~22.04.9
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 6.2.0.32.32~22.04.9
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 6.2.0.32.32~22.04.9
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 6.2.0.32.32~22.04.9
linux-image-6.2.0-1004-starfive (Ubuntu package) - update to 6.2.0-1004.5
linux-image-starfive (Ubuntu package) - update to 6.2.0.1004.7
linux-image-6.2.0-1009-ibm (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1011-oracle (Ubuntu package) - update to 6.2.0-1011.11
linux-image-6.2.0-1011-azure (Ubuntu package) - update to 6.2.0-1011.11
linux-image-6.2.0-1011-aws (Ubuntu package) - update to 6.2.0-1011.11~22.04.1
linux-image-6.2.0-1012-kvm (Ubuntu package) - update to 6.2.0-1012.12
linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package) - update to 6.2.0-1012.12~22.04.1
linux-image-6.2.0-1012-lowlatency (Ubuntu package) - update to 6.2.0-1012.12~22.04.1
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package) - update to 6.2.0.1012.12~22.04.9
linux-image-lowlatency-hwe-22.04 (Ubuntu package) - update to 6.2.0.1012.12~22.04.9
linux-image-6.2.0-1012-raspi (Ubuntu package) - update to 6.2.0-1012.14
linux-image-6.2.0-1013-gcp (Ubuntu package) - addressed in versions 6.2.0-1013.13, 6.2.0-1013.13~22.04.1

External References

Related Security Bulletins