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Vulnerability · Published Aug 2, 2025 · Assigned by redhat

CVE-2023-32253Kernel: deadlock in ksmbd_find_crypto_ctx()

Medium 5.9

In plain English

A medium-severity security flaw in 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 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 73.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in the Linux kernel's ksmbd component. A deadlock is triggered by sending multiple concurrent session setup requests, possibly leading to a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.37-1DEBIAN-CVE-2023-32253
Debian:13linux6.3.7-1DEBIAN-CVE-2023-32253
Debian:14linux6.3.7-1DEBIAN-CVE-2023-32253
Ubuntu:22.04:LTSlinux5.15.0-83.92UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-aws5.15.0-1044.49UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-azure5.15.0-1046.53UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1046.53.1UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-gcp5.15.0-1041.49UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-gke5.15.0-1041.46UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1027.32UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-ibm5.15.0-1037.40UBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1039.45UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-kvm5.15.0-1041.46UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-83.92UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1032.32UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1017.17UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1004.4UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-oracle5.15.0-1042.48UBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-raspi5.15.0-1037.40UBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-32253
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-32253
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1025.29UBUNTU-CVE-2023-32253

Affected products (as reported)

VendorProductVersions
linux 0 – before 5.15.1126.0.0 – before 6.0.*6.1.0 – before 6.1.286.2.0 – before 6.2.156.3.0 – before 6.3.2
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-413 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References