Log in Start free

Vulnerability · Published Dec 4, 2025 · Assigned by Linux

CVE-2025-40242gfs2: Fix unlikely race in gdlm_put_lock

High 7.0

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 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.0High
Exploit odds (30 days)0.2%top 95.2% 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: gfs2: Fix unlikely race in gdlm_put_lock In gdlm_put_lock(), there is a small window of time in which the DFL_UNMOUNT flag has been set but the lockspace hasn't been released, yet. In that window, dlm may still call gdlm_ast() and gdlm_bast(). To prevent it from dereferencing freed glock objects, only free the glock if the lockspace has actually been released.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-abi-stablelists4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-core4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-cross-headers4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-core4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-modules4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-doc4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-headers4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-modules4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-modules-extra4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-rt4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-core4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-core4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-devel4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-modules4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-tools4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-tools-libs4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8perf4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8python3-perf4.18.0-553.171.1.el8_10ALSA-2026:75747
Debian:12linux6.1.170-1DEBIAN-CVE-2025-40242
Debian:13linux6.12.57-1DEBIAN-CVE-2025-40242
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40242
Rocky Linux:8kernel0:4.18.0-553.171.1.el8_10RLSA-2026:75747
Rocky Linux:8kernel-rt0:4.18.0-553.171.1.rt7.512.el8_10RLSA-2026:75746
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux6.8.0-106.106UBUNTU-CVE-2025-40242
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-aws6.8.0-1050.53UBUNTU-CVE-2025-40242
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1050.53~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-azure6.8.0-1051.57UBUNTU-CVE-2025-40242
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1051.57~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-40242
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-gcp6.8.0-1052.55UBUNTU-CVE-2025-40242
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1052.55~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-gke6.8.0-1048.53UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1035.38UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-106.106~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-ibm6.8.0-1049.49UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1049.49~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-106.106.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-106.106.1~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1049.52UBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1049.52~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1049.52.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1020.20UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-oracle6.8.0-1047.48UBUNTU-CVE-2025-40242
Ubuntu:25.10linux-oracle6.17.0-1007.7UBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1047.48~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-raspi6.8.0-1050.54UBUNTU-CVE-2025-40242
Ubuntu:25.10linux-raspi6.17.0-1008.8UBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40242
Ubuntu:25.10linux-realtime6.17.0-1006.7UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40242
Ubuntu:25.10linux-riscv6.17.0-14.14.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-106.106~22.04.1UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-40242
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1028.29UBUNTU-CVE-2025-40242
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-40242

Affected products (as reported)

VendorProductVersions
Linux Linux d1340f80f0b8066321b499a376780da00560e857 – before 5fdc1474e678eea1700aa266c0b7c2c96f81dd0dd1340f80f0b8066321b499a376780da00560e857 – before 4913592a3358f6ec366b8346b733d5e2360b08e1d1340f80f0b8066321b499a376780da00560e857 – before 279bde3bbb0ac0bad5c729dfa85983d75a5d7641d1340f80f0b8066321b499a376780da00560e857 – before 64c61b4ac645222fa7b724cef616c1f862a72a40d1340f80f0b8066321b499a376780da00560e857 – before 28c4d9bc0708956c1a736a9e49fee71b65deee816aa628c45875e7b8cca81ed9447a12a0e8f3504aa97e75203733be0a4263a78fb7b29352be150c1c3554b46204e67333e1fb8be0e93936fb08267c80
Linux Linux 5.15

References