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Vulnerability · Published Mar 27, 2025 · Assigned by Linux

CVE-2023-53006cifs: Fix oops due to uncleared server->smbd_conn in reconnect

Critical 9.8

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 0.6% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 53.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix oops due to uncleared server->smbd_conn in reconnect In smbd_destroy(), clear the server->smbd_conn pointer after freeing the smbd_connection struct that it points to so that reconnection doesn't get confused.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.11-1DEBIAN-CVE-2023-53006
Debian:13linux6.1.11-1DEBIAN-CVE-2023-53006
Debian:14linux6.1.11-1DEBIAN-CVE-2023-53006
Ubuntu:22.04:LTSlinux5.15.0-70.77UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-aws5.15.0-1034.38UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-azure5.15.0-1036.43UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1036.43.1UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-gcp5.15.0-1032.40UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-gke5.15.0-1031.36UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1018.23UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-ibm5.15.0-1028.31UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1028.33UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-kvm5.15.0-1031.36UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-70.77UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-oracle5.15.0-1033.39UBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-raspi5.15.0-1027.29UBUNTU-CVE-2023-53006
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53006
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53006
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53006

Affected products (as reported)

VendorProductVersions
Linux Linux 8ef130f9ec27973f7b49e20c5a3b9134ca33026c – before a9640c0b268405f2540e8203a545e930ea88bb7d8ef130f9ec27973f7b49e20c5a3b9134ca33026c – before 91be54849d5392050f5b847b42bd5e6221551ac88ef130f9ec27973f7b49e20c5a3b9134ca33026c – before e037baee16e0b9ace7e730888fcae9cec11daff28ef130f9ec27973f7b49e20c5a3b9134ca33026c – before 4b83bc6f87eedab4599b0123e572a422689444be8ef130f9ec27973f7b49e20c5a3b9134ca33026c – before 5109607a4ece7cd8536172bf7549eb4dce1f35768ef130f9ec27973f7b49e20c5a3b9134ca33026c – before b7ab9161cf5ddc42a288edf9d1a61f3bdffe17c7
Linux Linux 4.16

References