{"id":"CVE-2026-98854","state":"PUBLISHED","title":"of/overlay: only treat a positive changeset id as registered","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.","publishedAt":"2026-10-18T15:51:06.167Z","updatedAt":"2026-10-30T12:40:15.237Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","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"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/of/overlay.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","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"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/of/overlay.c"]}],"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"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98854.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98854","state":"PUBLISHED","datePublished":"2026-10-18T15:51:06.167Z","dateUpdated":"2026-10-30T12:40:15.237Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.376Z"},"containers":{"cna":{"title":"of/overlay: only treat a positive changeset id as registered","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","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"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/of/overlay.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","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"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/of/overlay.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/7af5d66d0514b8f1d759d0e32b9d4c5d26263e4a"},{"url":"https://git.kernel.org/stable/c/71065f3d6864a101b77e7af84566757c4df415a0"},{"url":"https://git.kernel.org/stable/c/cc688475c56d34a2b584141f9544cbe23360080d"},{"url":"https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39"},{"url":"https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1"},{"url":"https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15"},{"url":"https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:40:15.237Z"},"cpeApplicability":[{"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}