In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()
During unmount process of nilfs2, nothing holds nilfs_root structure after nilfs2 detaches its writer in nilfs_detach_log_writer(). However, since nilfs_evict_inode() uses nilfs_root for some cleanup operations, it may cause use-after-free read if inodes are left in "garbage_list" and released by nilfs_dispose_list() at the end of nilfs_detach_log_writer().
Fix this issue by modifying nilfs_evict_inode() to only clear inode without additional metadata changes that use nilfs_root if the file system is degraded to read-only or the writer is detached.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernelUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-livepatch-4.14.318-240.529Upgrade perfUpgrade python-perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.10.184-174.730Upgrade kernel-tools | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Dec 10, 2025 | Dec 10, 2025 |
| Ubuntu | — | Upgrade linux-aws-5.15Upgrade linux-aws-fipsUpgrade linux-ibm-5.15Upgrade linux-oracleUpgrade linux-gkeUpgrade linux-intel-iotg-5.15Upgrade linux-nvidia-tegraUpgrade linux-nvidiaUpgrade linux-oracle-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-aws-5.4Upgrade linux-kvmUpgrade linux-hwe-5.4Upgrade linux-oracle-5.15Upgrade linux-realtimeUpgrade linux-xilinx-zynqmpUpgrade linux-gcp-5.15Upgrade linux-intel-iotgUpgrade linux-intel-iot-realtimeUpgrade linux-lowlatencyUpgrade linux-nvidia-tegra-igxUpgrade linux-azure-5.15Upgrade linux-riscv-5.15Upgrade linux-fipsUpgrade linux-gkeopUpgrade linux-gcpUpgrade linux-ibmUpgrade linux-ibm-5.4Upgrade linux-gcp-fipsUpgrade linux-raspiUpgrade linux-azure-5.4Upgrade linux-azureUpgrade linux-gcp-5.4Upgrade linux-nvidia-tegra-5.15Upgrade linux-bluefieldUpgrade linux-hwe-5.15Upgrade linuxUpgrade linux-iotUpgrade linux-raspi-5.4Upgrade linux-awsUpgrade linux-azure-fips | Dec 11, 2025 | Dec 9, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 9, 2025 |
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