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Vulnerability · Published Aug 16, 2025 · Assigned by Linux

CVE-2023-4130ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()

High 8.1

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.5%top 56.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea() There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len, not next variable. next is the start offset of current ea that got from previous ea.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.52-1DEBIAN-CVE-2023-4130
Debian:13linux6.4.11-1DEBIAN-CVE-2023-4130
Debian:14linux6.4.11-1DEBIAN-CVE-2023-4130
Ubuntu:22.04:LTSlinux5.15.0-91.101UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-aws5.15.0-1051.56UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-azure5.15.0-1053.61UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1053.61.1UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-gcp5.15.0-1048.56UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-gke5.15.0-1048.53UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1034.40UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-ibm5.15.0-1044.47UBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1046.52UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-kvm5.15.0-1048.53UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-91.101UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1042.42UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1020.20UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1007.7UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-oracle5.15.0-1049.55UBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-raspi5.15.0-1044.47UBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-4130
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-4130
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1027.31UBUNTU-CVE-2023-4130

Affected products (as reported)

VendorProductVersions
Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before aeb974907642be095e38ecb1a400ca583958b2b0e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before f339d76a3a972601d0738b881b099d49ebbdc3a2e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before 4bf629262f9118ee91b1c3a518ebf2b3bcb22180e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before 79ed288cef201f1f212dfb934bcaac75572fb8f6
Linux Linux 5.15

References