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Linux Kernel: Filesystem Downtime Risk Due to Deadlock
UBUNTU-CVE-2026-23232
Summary
A fix has been made to prevent a rare situation where a Linux system's filesystem could become unavailable, requiring a reboot. This affects Linux systems using the F2FS filesystem. Users should update their Linux kernel to the latest version to ensure this issue is resolved.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| canonical | linux-hwe-edge | All versions | – |
| canonical | linux-aws-5.0 | All versions | – |
| canonical | linux-aws-5.3 | All versions | – |
| canonical | linux-azure | All versions | – |
| canonical | linux-azure-5.3 | All versions | – |
| canonical | linux-azure-edge | All versions | – |
| canonical | linux-gcp | All versions | – |
| canonical | linux-gcp-5.3 | All versions | – |
| canonical | linux-gke-4.15 | All versions | – |
| canonical | linux-gke-5.4 | All versions | – |
| canonical | linux-gkeop-5.4 | All versions | – |
| canonical | linux-hwe | All versions | – |
| canonical | linux-hwe-edge | All versions | – |
| canonical | linux-oem | All versions | – |
| canonical | linux-oracle-5.0 | All versions | – |
| canonical | linux-oracle-5.3 | All versions | – |
| canonical | linux-aws-5.11 | All versions | – |
| canonical | linux-aws-5.13 | All versions | – |
| canonical | linux-aws-5.8 | All versions | – |
| canonical | linux-azure-5.11 | All versions | – |
| canonical | linux-azure-5.13 | All versions | – |
| canonical | linux-azure-5.8 | All versions | – |
| canonical | linux-azure-fde | All versions | – |
| canonical | linux-gcp-5.11 | All versions | – |
| canonical | linux-gcp-5.13 | All versions | – |
| canonical | linux-gcp-5.8 | All versions | – |
| canonical | linux-gke | All versions | – |
| canonical | linux-gke-5.15 | All versions | – |
| canonical | linux-gkeop | All versions | – |
| canonical | linux-gkeop-5.15 | All versions | – |
| canonical | linux-hwe-5.11 | All versions | – |
| canonical | linux-hwe-5.13 | All versions | – |
| canonical | linux-hwe-5.8 | All versions | – |
| canonical | linux-intel-5.13 | All versions | – |
| canonical | linux-oem-5.10 | All versions | – |
| canonical | linux-oem-5.13 | All versions | – |
| canonical | linux-oem-5.14 | All versions | – |
| canonical | linux-oem-5.6 | All versions | – |
| canonical | linux-oracle-5.11 | All versions | – |
| canonical | linux-oracle-5.13 | All versions | – |
| canonical | linux-oracle-5.8 | All versions | – |
| canonical | linux-raspi2 | All versions | – |
| canonical | linux-riscv | All versions | – |
| canonical | linux-riscv-5.11 | All versions | – |
| canonical | linux-riscv-5.8 | All versions | – |
| canonical | linux-allwinner-5.19 | All versions | – |
| canonical | linux-aws-5.19 | All versions | – |
| canonical | linux-aws-6.2 | All versions | – |
| canonical | linux-aws-6.5 | All versions | – |
| canonical | linux-azure-5.19 | All versions | – |
| canonical | linux-azure-6.2 | All versions | – |
| canonical | linux-azure-6.5 | All versions | – |
| canonical | linux-azure-fde-5.19 | All versions | – |
| canonical | linux-azure-fde-6.2 | All versions | – |
| canonical | linux-gcp-5.19 | All versions | – |
| canonical | linux-gcp-6.2 | All versions | – |
| canonical | linux-gcp-6.5 | All versions | – |
| canonical | linux-hwe-5.19 | All versions | – |
| canonical | linux-hwe-6.2 | All versions | – |
| canonical | linux-hwe-6.5 | All versions | – |
| canonical | linux-intel-iot-realtime | All versions | – |
| canonical | linux-lowlatency-hwe-5.19 | All versions | – |
| canonical | linux-lowlatency-hwe-6.2 | All versions | – |
| canonical | linux-lowlatency-hwe-6.5 | All versions | – |
| canonical | linux-nvidia-6.2 | All versions | – |
| canonical | linux-nvidia-6.5 | All versions | – |
| canonical | linux-oem-5.17 | All versions | – |
| canonical | linux-oem-6.0 | All versions | – |
| canonical | linux-oem-6.1 | All versions | – |
| canonical | linux-oem-6.5 | All versions | – |
| canonical | linux-oracle-6.5 | All versions | – |
| canonical | linux-realtime | All versions | – |
| canonical | linux-riscv | All versions | – |
| canonical | linux-riscv-5.19 | All versions | – |
| canonical | linux-riscv-6.5 | All versions | – |
| canonical | linux-starfive-5.19 | All versions | – |
| canonical | linux-starfive-6.2 | All versions | – |
| canonical | linux-starfive-6.5 | All versions | – |
| canonical | linux-azure-6.11 | All versions | – |
| canonical | linux-gcp-6.11 | All versions | – |
| canonical | linux-hwe-6.11 | All versions | – |
| canonical | linux-lowlatency-hwe-6.11 | All versions | – |
| canonical | linux-nvidia-6.11 | All versions | – |
| canonical | linux-oem-6.11 | All versions | – |
| canonical | linux-oem-6.14 | All versions | – |
| canonical | linux-oem-6.8 | All versions | – |
| canonical | linux-oracle-6.14 | All versions | – |
| canonical | linux-raspi-realtime | All versions | – |
| canonical | linux-realtime | All versions | – |
| canonical | linux-riscv | All versions | – |
| canonical | linux-riscv-6.14 | All versions | – |
| canonical | linux-realtime-6.14 | All versions | – |
Original title
In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: block cache/dio write during f2fs_enable_checkpoint()" This reverts commit 196c81fdd438f7ac429d5639090a9816abb9760a...
Original description
In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: block cache/dio write during f2fs_enable_checkpoint()" This reverts commit 196c81fdd438f7ac429d5639090a9816abb9760a. Original patch may cause below deadlock, revert it. write remount - write_begin - lock_page --- lock A - prepare_write_begin - f2fs_map_lock - f2fs_enable_checkpoint - down_write(cp_enable_rwsem) --- lock B - sync_inode_sb - writepages - lock_page --- lock A - down_read(cp_enable_rwsem) --- lock A
- https://ubuntu.com/security/CVE-2026-23232 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-23232 Third Party Advisory
- https://git.kernel.org/linus/3996b70209f145bfcf2afc7d05dd92c27b233b48 Third Party Advisory
- https://git.kernel.org/stable/c/3996b70209f145bfcf2afc7d05dd92c27b233b48 Third Party Advisory
- https://git.kernel.org/stable/c/b6382273801bc7c778545dd8004c9a9d750b4f62 Third Party Advisory
Published: 5 Mar 2026 · Updated: 13 Mar 2026 · First seen: 9 Mar 2026