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Vulnerability · Published Jul 30, 2025 · Assigned by redhat

CVE-2023-2593Kernel: ksmbd memory exhaustion denial-of-service vulnerability

Medium 5.9

In plain English

A medium-severity infinite loop in linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.8%top 41.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw exists within the Linux kernel's handling of new TCP connections. The issue results from the lack of memory release after its effective lifetime. This vulnerability allows an unauthenticated attacker to create a denial of service condition on the system.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.7-1DEBIAN-CVE-2023-2593
Debian:13linux6.1.7-1DEBIAN-CVE-2023-2593
Debian:14linux6.1.7-1DEBIAN-CVE-2023-2593
Ubuntu:22.04:LTSlinux5.15.0-69.76UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-aws5.15.0-1033.37UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-azure5.15.0-1035.42UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1035.42.1UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-gcp5.15.0-1031.38UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-gke5.15.0-1030.35UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1017.22UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-ibm5.15.0-1027.30UBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1027.32UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-kvm5.15.0-1030.35UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-69.76UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-oracle5.15.0-1032.38UBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-raspi5.15.0-1026.28UBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-2593
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-2593
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-2593

Affected products (as reported)

VendorProductVersions
linux 0 – before 6.2-rc3
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-835 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References