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Vulnerability · Published Jul 26, 2023 · Assigned by canonical

CVE-2023-2640

High 7.8

In plain English

A high-severity incorrect authorization in Ubuntu Kernel from Canonical. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 15.2% (higher than 97% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)15.2%top 3.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling2Metasploit, Public PoC

Official description

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Ubuntu:22.04:LTSlinux5.15.0-177.187USN-8255-1
Ubuntu:22.04:LTSlinux5.15.0-177.187UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-aws5.15.0-1106.113UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-aws5.15.0-1106.113USN-8255-1
Ubuntu:22.04:LTSlinux-aws-5.195.19.0-1029.30~22.04.1USN-6260-1
Ubuntu:22.04:LTSlinux-aws-5.195.19.0-1029.30~22.04.1UBUNTU-CVE-2023-2640
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-aws-6.26.2.0-1008.8~22.04.1UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-azure5.15.0-1111.120USN-8255-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1111.120UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-azure-6.26.2.0-1008.8~22.04.1UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1114.123UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-gcp5.15.0-1106.115UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-gcp5.15.0-1106.115USN-8255-1
Ubuntu:22.04:LTSlinux-gcp-5.195.19.0-1030.32~22.04.1UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-gcp-5.195.19.0-1030.32~22.04.1USN-6260-1
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-gcp-6.26.2.0-1010.10~22.04.1UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-gke5.15.0-1102.108USN-8255-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1102.108UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1089.97USN-8255-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1089.97UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-hwe-5.195.19.0-50.50USN-6260-1
Ubuntu:22.04:LTSlinux-hwe-5.195.19.0-50.50UBUNTU-CVE-2023-2640
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-hwe-6.26.2.0-26.26~22.04.1UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-ibm5.15.0-1100.103USN-8255-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1100.103UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1101.107USN-8255-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1101.107UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-kvm5.15.0-1098.103USN-8255-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1098.103UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-177.187USN-8255-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-177.187UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.195.19.0-1030.30UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.26.2.0-1009.9~22.04.1UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1101.102UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1101.102USN-8255-1
Ubuntu:22.04:LTSlinux-nvidia-6.26.2.0-1009.9UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1058.58USN-8255-1
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1058.58UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1047.47USN-8255-1
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1047.47UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oem-6.06.0.0-1020.20USN-6248-1
Ubuntu:22.04:LTSlinux-oem-6.06.0.0-1020.20UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1019.19UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1019.19USN-6285-1
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oracle5.15.0-1103.109UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oracle5.15.0-1103.109USN-8255-1
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-raspi5.15.0-1100.103UBUNTU-CVE-2023-2640
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1070.74UBUNTU-CVE-2023-2640
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1070.74USN-8275-1

Affected products (as reported)

VendorProductVersions
Canonical Ubuntu Kernel see references

Weakness: CWE-863 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References