{"id":"CVE-2026-98854","summary":"of/overlay: only treat a positive changeset id as registered","details":"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-\u003eid before checking it. On failure the stored id is negative,\nfree_overlay_changeset()'s \"if (ovcs-\u003eid)\" check passes, idr_remove()\nis called with a negative id and list_del() runs on ovcs-\u003eovcs_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.","modified":"2026-10-19T02:47:37.466900019Z","published":"2026-10-18T15:51:06.167Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98854.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98854.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98854"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"61b4de4e0b384f4a22c55c3bada604da49cec4e1"},{"fixed":"c08a54df9d33dcd6ff089adc9434b2c008af3a39"},{"fixed":"0d1525fdcd3355672b7485d61e55df6824ab5ad1"},{"fixed":"c875407c34dadaef0599834ad9c815f4c9f50d15"},{"fixed":"44081d708b5b885487bac792db78324b7b4c267d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98854.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"6.12.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.56"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98854.json"}}],"schema_version":"1.9.0"}