Log in Start free

Vulnerability · Published Sep 18, 2025 · Assigned by Linux

CVE-2023-53381NFSD: fix leaked reference count of nfsd4_ssc_umount_item

High 7.5

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 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 78.8% 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: NFSD: fix leaked reference count of nfsd4_ssc_umount_item The reference count of nfsd4_ssc_umount_item is not decremented on error conditions. This prevents the laundromat from unmounting the vfsmount of the source file. This patch decrements the reference count of nfsd4_ssc_umount_item on error.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.20-1DEBIAN-CVE-2023-53381
Debian:13linux6.1.20-1DEBIAN-CVE-2023-53381
Debian:14linux6.1.20-1DEBIAN-CVE-2023-53381
Ubuntu:22.04:LTSlinux5.15.0-116.126UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-aws5.15.0-1065.71UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-azure5.15.0-1068.77UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1068.77.1UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-gcp5.15.0-1064.72UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-gke5.15.0-1062.68UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1048.55UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-ibm5.15.0-1058.61UBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1060.66UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-kvm5.15.0-1062.67UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-116.126UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1060.61UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1026.26UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1015.15UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-oracle5.15.0-1063.69UBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-raspi5.15.0-1058.61UBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53381
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53381
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39UBUNTU-CVE-2023-53381

Affected products (as reported)

VendorProductVersions
Linux Linux a4bc287943f5695209ff36bdc89f17b48d68fae7 – before 2da50149981d05955e51c28e982e9ac29bd73417f4e44b393389c77958f7c58bf4415032b4cda15b – before 80a15dc4a0214b55ca42675bb0bb2a8d857eb1d0f4e44b393389c77958f7c58bf4415032b4cda15b – before 9f0df37520a27ad99eaacf38418b3d2bb5023105f4e44b393389c77958f7c58bf4415032b4cda15b – before 6c3c05402547aaca3edb23327b50f01a881831b9f4e44b393389c77958f7c58bf4415032b4cda15b – before 34e8f9ec4c9ac235f917747b23a200a5e0ec857b
Linux Linux 5.14

References