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Linux Kernel: Fix for Data Loss in XFS File System
UBUNTU-CVE-2026-23223
Summary
A bug in the Linux kernel's XFS file system could have caused data loss. It was fixed to prevent a situation where the kernel tried to access memory that had already been freed. This issue was resolved, so no action is required, but it's essential to keep your Linux system up to date to ensure you have the latest security patches.
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-aws-6.14 | All versions | – |
| canonical | linux-aws-6.17 | All versions | – |
| canonical | linux-azure-6.11 | All versions | – |
| canonical | linux-azure-6.14 | All versions | – |
| canonical | linux-azure-6.17 | All versions | – |
| canonical | linux-azure-fde-6.14 | All versions | – |
| canonical | linux-azure-fde-6.17 | All versions | – |
| canonical | linux-azure-nvidia-6.14 | All versions | – |
| canonical | linux-gcp-6.11 | All versions | – |
| canonical | linux-gcp-6.14 | All versions | – |
| canonical | linux-gcp-6.17 | All versions | – |
| canonical | linux-hwe-6.11 | All versions | – |
| canonical | linux-hwe-6.14 | All versions | – |
| canonical | linux-hwe-6.17 | 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-6.17 | All versions | – |
| canonical | linux-oem-6.8 | All versions | – |
| canonical | linux-oracle-6.14 | All versions | – |
| canonical | linux-oracle-6.17 | 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-riscv-6.17 | All versions | – |
| canonical | linux-realtime-6.14 | All versions | – |
| canonical | linux | All versions | – |
| canonical | linux-aws | All versions | – |
| canonical | linux-azure | All versions | – |
| canonical | linux-azure-fde | All versions | – |
| canonical | linux-gcp | All versions | – |
| canonical | linux-oracle | All versions | – |
| canonical | linux-raspi | All versions | – |
| canonical | linux-realtime | All versions | – |
| canonical | linux-riscv | All versions | – |
Original title
In the Linux kernel, the following vulnerability has been resolved: xfs: fix UAF in xchk_btree_check_block_owner We cannot dereference bs->cur when trying to determine if bs->cur aliases bs->sc->sa...
Original description
In the Linux kernel, the following vulnerability has been resolved: xfs: fix UAF in xchk_btree_check_block_owner We cannot dereference bs->cur when trying to determine if bs->cur aliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed. Fix this by sampling before type before any freeing could happen. The correct temporal ordering was broken when we removed xfs_btnum_t.
- https://ubuntu.com/security/CVE-2026-23223 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-23223 Third Party Advisory
- https://git.kernel.org/stable/c/1d411278dda293a507cb794db7d9ed3511c685c6 Third Party Advisory
- https://git.kernel.org/stable/c/ba5264610423d9653aa36920520902d83841bcfd Third Party Advisory
- https://git.kernel.org/stable/c/ed82e7949f5cac3058f4100f3cd670531d41a266 Third Party Advisory
Published: 18 Feb 2026 · Updated: 13 Mar 2026 · First seen: 9 Mar 2026