In the Linux kernel, the following vulnerability has been resolved:
ext4: fix buffer_head leak in ext4_init_orphan_info
ext4_init_orphan_info() reads orphan file blocks with ext4_bread() and stores the returned buffer_head in oi->of_binfo[i].ob_bh.
If ext4_bread() succeeds but the orphan block magic or checksum validation fails, the function jumps to out_free. However, the old out_free loop starts releasing buffers from i - 1, so the current buffer_head at index i is skipped.
This leaks the buffer_head reference obtained by ext4_bread() on the bad magic and bad checksum error paths.
Fix this by tracking the number of successfully read buffer_heads and releasing exactly those buffer_heads on the error path.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade python3-perf-debuginfoUpgrade kernel-develUpgrade kernel-livepatch-6.1.188-233.385Upgrade perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-modules-extraUpgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-modules-extra-commonUpgrade kernel-tools-develUpgrade kernelUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade python3-perf | Oct 13, 2026 | Sep 17, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Sep 30, 2026 | Sep 17, 2026 |
| Redhat_linux | — | No solution exists | Sep 25, 2026 | Sep 17, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 30, 2026 | Sep 17, 2026 |
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