In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix reloc root cleanup in merge_reloc_roots()
If the root we got has zero root refs in its root item, we are resetting the root's ->reloc_root without using barriers like we do everywhere else. Sashiko complained about this while reviewing another patch, and it's correct (see the Link tag below).
Also, we should not clear BTRFS_ROOT_DEAD_RELOC_TREE from the root unless the root points to the reloc root we have.
Fix this by using clear_reloc_root(), which issues the memory barrier after setting the root's ->reloc_root to NULL and before clearing the bit BTRFS_ROOT_DEAD_RELOC_TREE from the root.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade python3-perf6.12-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-modules-extraUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-toolsUpgrade kernel6.12-debuginfoUpgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-tools-develUpgrade kernel6.12-debuginfo-common-x86_64Upgrade perf6.12Upgrade kernel6.12Upgrade bpftool6.12Upgrade perf6.12-debuginfoUpgrade kernel6.12-develUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-headersUpgrade python3-perf6.12Upgrade kernel-livepatch-6.12.111-136.204 | Oct 13, 2026 | Sep 24, 2026 |
| Debian | — | Upgrade linux-6.12Upgrade linux | Sep 30, 2026 | Sep 24, 2026 |
| Redhat_linux | — | No solution exists | Sep 30, 2026 | Sep 24, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Sep 24, 2026 |
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