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Vulnerability · Published Oct 1, 2025 · Assigned by Linux

CVE-2025-39902mm/slub: avoid accessing metadata when pointer is invalid in object_err()

High 7.1

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)7.1High
Exploit odds (30 days)0.2%top 94.0% 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: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-abi-stablelists4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-core4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-cross-headers4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-debug4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-debug-core4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-debug-devel4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-debug-modules4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-devel4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-doc4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-headers4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-modules4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-modules-extra4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-rt4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-core4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-debug4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-debug-core4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-devel4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-modules4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.156.1.rt7.497.el8_10ALSA-2026:55765
AlmaLinux:8kernel-tools4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-tools-libs4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-zfcpdump4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8perf4.18.0-553.156.1.el8_10ALSA-2026:55764
AlmaLinux:8python3-perf4.18.0-553.156.1.el8_10ALSA-2026:55764
Debian:12linux6.1.153-1DEBIAN-CVE-2025-39902
Debian:13linux6.12.48-1DEBIAN-CVE-2025-39902
Debian:14linux6.16.6-1DEBIAN-CVE-2025-39902
Rocky Linux:8kernel0:4.18.0-553.156.1.el8_10RLSA-2026:55764
Rocky Linux:8kernel-rt0:4.18.0-553.156.1.rt7.497.el8_10RLSA-2026:55765
Ubuntu:22.04:LTSlinux5.15.0-163.173UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux6.8.0-106.106UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-aws5.15.0-1097.104UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-aws6.8.0-1050.53UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1050.53~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure5.15.0-1101.110UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-azure6.8.0-1051.57UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1051.57~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1102.111.1UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-39902
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-gcp5.15.0-1097.106UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-gcp6.8.0-1052.55UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1052.55~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-gke5.15.0-1093.99UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-gke6.8.0-1048.53UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1080.88UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1035.38UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-106.106~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-ibm5.15.0-1091.94UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-ibm6.8.0-1049.49UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1049.49~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1092.98UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-kvm5.15.0-1089.94UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-163.173UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-106.106.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-106.106.1~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1092.93UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1049.52UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1049.52~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1049.52.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1049.49UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1020.20UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1038.38UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-oracle5.15.0-1094.100UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-oracle6.8.0-1047.48UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1047.48~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-raspi5.15.0-1091.94UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-raspi6.8.0-1050.54UBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-106.106~22.04.1UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-39902
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1028.29UBUNTU-CVE-2025-39902
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1061.65UBUNTU-CVE-2025-39902

Affected products (as reported)

VendorProductVersions
Linux Linux 81819f0fc8285a2a5a921c019e3e3d7b6169d225 – before 872f2c34ff232af1e65ad2df86d61163c8ffad4281819f0fc8285a2a5a921c019e3e3d7b6169d225 – before f66012909e7bf383fcdc5850709ed5716073fdc481819f0fc8285a2a5a921c019e3e3d7b6169d225 – before 7e287256904ee796c9477e3ec92b07f236481ef381819f0fc8285a2a5a921c019e3e3d7b6169d225 – before 1f0797f17927b5cad0fb7eced422f9a7c30a319181819f0fc8285a2a5a921c019e3e3d7b6169d225 – before 0ef7058b4dc6fcef622ac23b45225db57f17b83f81819f0fc8285a2a5a921c019e3e3d7b6169d225 – before dda6ec365ab04067adae40ef17015db447e9073681819f0fc8285a2a5a921c019e3e3d7b6169d225 – before 3baa1da473e6e50281324ff1d332d1a07a3bb02e81819f0fc8285a2a5a921c019e3e3d7b6169d225 – before b4efccec8d06ceb10a7d34d7b1c449c569d53770
Linux Linux 2.6.22

References