CVE-2026-98854
In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overla
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Published: Oct 18, 2026 · Last modified: Oct 19, 2026
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In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. An allocation failure at that point dereferences NULL. Make free_overlay_changeset() treat only a strict-positive id as registered. The rest of the function already copes with a partially-initialized ovcs, so the error path stays a plain goto err_free_ovcs.
- git.kernel.orghttps://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1
- git.kernel.orghttps://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d
- git.kernel.orghttps://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39
- git.kernel.orghttps://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15
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