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Vulnerability · Published Dec 8, 2025 · Assigned by Linux

CVE-2023-53751cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname

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 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.4%top 64.0% 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: cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname TCP_Server_Info::hostname may be updated once or many times during reconnect, so protect its access outside reconnect path as well and then prevent any potential use-after-free bugs.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-abi-stablelists4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-core4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-cross-headers4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-debug4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-debug-core4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-debug-devel4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-debug-modules4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-devel4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-doc4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-headers4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-modules4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-modules-extra4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-tools4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-tools-libs4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-zfcpdump4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8perf4.18.0-553.82.1.el8_10ALSA-2025:19447
AlmaLinux:8python3-perf4.18.0-553.82.1.el8_10ALSA-2025:19447
Debian:12linux6.1.37-1DEBIAN-CVE-2023-53751
Debian:13linux6.3.7-1DEBIAN-CVE-2023-53751
Debian:14linux6.3.7-1DEBIAN-CVE-2023-53751
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-azure5.15.0-1051.59UBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1051.59.1UBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53751
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2023-53751

Affected products (as reported)

VendorProductVersions
Linux Linux 93d5cb517db39e8af8d1292f9e785e4983b7f708 – before 64d62ac6d6514cba1305bd08e271ec1843bdd61293d5cb517db39e8af8d1292f9e785e4983b7f708 – before c511954bf142fe1995aec3c739a9f1a76990283a93d5cb517db39e8af8d1292f9e785e4983b7f708 – before 0b08c4c499200be67d54c439d56e5ea86686994593d5cb517db39e8af8d1292f9e785e4983b7f708 – before 90c49fce1c43e1cc152695e20363ff5087897c09
Linux Linux 5.0

References