{"id":"CVE-2026-98854","published":"2026-10-18T16:17:39.833","lastModified":"2026-10-19T10:19:49.490","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nof/overlay: only treat a positive changeset id as registered\n\nof_overlay_fdt_apply() stores the idr_alloc() return value in\novcs->id before checking it. On failure the stored id is negative,\nfree_overlay_changeset()'s \"if (ovcs->id)\" check passes, idr_remove()\nis called with a negative id and list_del() runs on ovcs->ovcs_list,\nwhich is not initialized until after the id allocation. An allocation\nfailure at that point dereferences NULL.\n\nMake free_overlay_changeset() treat only a strict-positive id as\nregistered. The rest of the function already copes with a\npartially-initialized ovcs, so the error path stays a plain\ngoto err_free_ovcs.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1","tags":[]},{"url":"https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d","tags":[]},{"url":"https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39","tags":[]},{"url":"https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}