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Vulnerability · Published Oct 1, 2025 · Assigned by Linux

CVE-2023-53473ext4: improve error handling from ext4_dirhash()

High 7.8

In plain English

A high-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 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 93.9% 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: ext4: improve error handling from ext4_dirhash() The ext4_dirhash() will *almost* never fail, especially when the hash tree feature was first introduced. However, with the addition of support of encrypted, casefolded file names, that function can most certainly fail today. So make sure the callers of ext4_dirhash() properly check for failures, and reflect the errors back up to their callers.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.37-1DEBIAN-CVE-2023-53473
Debian:13linux6.3.7-1DEBIAN-CVE-2023-53473
Debian:14linux6.3.7-1DEBIAN-CVE-2023-53473
Ubuntu:22.04:LTSlinux5.15.0-83.92UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-aws5.15.0-1044.49UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-azure5.15.0-1046.53UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1046.53.1UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-gcp5.15.0-1041.49UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-gke5.15.0-1041.46UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1027.32UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-ibm5.15.0-1037.40UBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1039.45UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-kvm5.15.0-1041.46UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-83.92UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1032.32UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1017.17UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1004.4UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-oracle5.15.0-1042.48UBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-raspi5.15.0-1037.40UBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53473
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53473
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1025.29UBUNTU-CVE-2023-53473

Affected products (as reported)

VendorProductVersions
Linux Linux b886ee3e778ec2ad43e276fd378ab492cf6819b7 – before b2531936118deb3f479c4fa1bcd787b74b8faa6ab886ee3e778ec2ad43e276fd378ab492cf6819b7 – before f68876aeef96ef8b708ab10b9cb47ce0a5adb424b886ee3e778ec2ad43e276fd378ab492cf6819b7 – before 70d579aefa652a06af97e013e3fbbabbe5a43553b886ee3e778ec2ad43e276fd378ab492cf6819b7 – before c1fae027da61fe8e7eb99f7244297e81bc0f1e43b886ee3e778ec2ad43e276fd378ab492cf6819b7 – before 4b3cb1d108bfc2aebb0d7c8a52261a53cf7f5786
Linux Linux 5.2

References