{"id":"CVE-2026-98854","aliases":[],"cve":{"records":[{"id":"CVE-2026-98854","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.376Z","published":"2026-10-18T15:51:06.167Z","modified":"2026-10-30T12:40:15.237Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:40:15.237Z"}],"references":[{"url":"https://git.kernel.org/stable/c/7af5d66d0514b8f1d759d0e32b9d4c5d26263e4a","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/71065f3d6864a101b77e7af84566757c4df415a0","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/cc688475c56d34a2b584141f9544cbe23360080d","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"of/overlay: only treat a positive changeset id as registered","titleSource":"Linux","descriptionSource":"Linux","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.","score":null,"severity":"unknown","published":"2026-10-18T15:51:06.167Z","modified":"2026-10-30T12:40:15.237Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"7af5d66d0514b8f1d759d0e32b9d4c5d26263e4a","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"71065f3d6864a101b77e7af84566757c4df415a0","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"cc688475c56d34a2b584141f9544cbe23360080d","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"c08a54df9d33dcd6ff089adc9434b2c008af3a39","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"0d1525fdcd3355672b7485d61e55df6824ab5ad1","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"c875407c34dadaef0599834ad9c815f4c9f50d15","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"44081d708b5b885487bac792db78324b7b4c267d","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98854"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98854"}],"remediation":[],"references":["https://git.kernel.org/stable/c/7af5d66d0514b8f1d759d0e32b9d4c5d26263e4a","https://git.kernel.org/stable/c/71065f3d6864a101b77e7af84566757c4df415a0","https://git.kernel.org/stable/c/cc688475c56d34a2b584141f9544cbe23360080d","https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39","https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1","https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15","https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d"],"sources":[{"name":"CVE","id":"CVE-2026-98854","modified":"2026-10-30T12:40:15.237Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98854"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-30T13:09:52.363Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:45:32.518Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}