{"schema":"threatline.record/2","record":{"id":"CVE-2026-98854","aliases":[],"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->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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98854","source_modified_at":"2026-10-21T12:57:33.107Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"cc688475c56d34a2b584141f9544cbe23360080d","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"c08a54df9d33dcd6ff089adc9434b2c008af3a39","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"0d1525fdcd3355672b7485d61e55df6824ab5ad1","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"c875407c34dadaef0599834ad9c815f4c9f50d15","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"44081d708b5b885487bac792db78324b7b4c267d","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98854","source_modified_at":"2026-10-21T12:57:33.107Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.15","status":"affected"},{"version":"0","lessThan":"4.15","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98854","source_modified_at":"2026-10-21T12:57:33.107Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0d1525fdcd3355672b7485d61e55df6824ab5ad1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98854","source_modified_at":"2026-10-21T12:57:33.107Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"44081d708b5b885487bac792db78324b7b4c267d","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00156,"percentile":0.044,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:51:06.167Z","modified_at":"2026-10-21T12:57:33.107Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98854","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:57:33.107Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98854","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/cc688475c56d34a2b584141f9544cbe23360080d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:57:33.107Z","content_hash":"e691f06e13b00fb7d3c1393c43fa54f9063d50bd6b2287c18b65d534d77ad7c3"}}