Log in Start free

Vulnerability · Published Aug 16, 2025 · Assigned by Linux

CVE-2023-4515ksmbd: validate command request size

Critical 9.1

In plain English

A critical-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 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.3%top 74.0% 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: validate command request size In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except for SMB2_OPLOCK_BREAK_HE command, the request size of other commands is not checked, it's not expected. Fix it by add check for request size of other commands.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.52-1DEBIAN-CVE-2023-4515
Debian:13linux6.4.11-1DEBIAN-CVE-2023-4515
Debian:14linux6.4.11-1DEBIAN-CVE-2023-4515
Ubuntu:22.04:LTSlinux5.15.0-91.101UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-aws5.15.0-1051.56UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-azure5.15.0-1053.61UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1053.61.1UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-gcp5.15.0-1048.56UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-gke5.15.0-1048.53UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1034.40UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-ibm5.15.0-1044.47UBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1046.52UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-kvm5.15.0-1048.53UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-91.101UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1042.42UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1020.20UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1007.7UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-oracle5.15.0-1049.55UBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-raspi5.15.0-1044.47UBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-4515
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-4515
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1027.31UBUNTU-CVE-2023-4515

Affected products (as reported)

VendorProductVersions
Linux Linux 35f450f54dca1519bb24faacd0428db09f89a11f – before 595679098bdcdbfbba91ebe07a2f7f208df938709650cf70ec9d94ff34daa088b643229231723c26 – before c6bef3bc30fd4a175aef846b7d928a6c40d091cd2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d – before ff7236b66d69582f90cf5616e63cfc3dc18142bb2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d – before 5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c768caf4019f0391c0b6452afe34cea1704133f7b5.15.121 – before 5.15.1276.1.36 – before 6.1.466.3.10 – before 6.4
Linux Linux 6.4

References