{"schema":"threatline.record/2","record":{"id":"CVE-2026-98831","aliases":[],"summary":"of/overlay: don't leak fragment references when changeset init fails","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nof/overlay: don't leak fragment references when changeset init fails\n\ninit_overlay_changeset() stores the number of initialized fragments\nin ovcs->count only on full success. When find_target() or the\n__symbols__ lookup fails partway through, the target and overlay\nreferences taken for the fragments initialized so far are never\ndropped: free_overlay_changeset() bounds its cleanup loop by\novcs->count, which is still 0.\n\nStore the running count on the error path so free_overlay_changeset()\nputs whatever was set up. The store is guarded by ovcs->fragments\nbecause on the allocation-failure path cnt still holds the counting\npass total while there is no fragments array; everywhere else cnt\nonly counts fully-initialized fragments.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","source_modified_at":"2026-10-21T12:57:18.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"702b5db6e7b3865be70675d57d6fd7dde80d02b6","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"894573e2fdaeb1b15030b7eebc22615edf28a6cd","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"7a46f1917b320cc8762183b802301da02a191b6a","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"3a23fb158ba517b77a2e5258263bdfdaa480f758","status":"affected","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","lessThan":"1d62f0f2bc7edb12ed09f71203df0e47fa4efca4","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","source_modified_at":"2026-10-21T12:57:18.542Z","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-2026-98831","source_modified_at":"2026-10-21T12:57:18.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"702b5db6e7b3865be70675d57d6fd7dde80d02b6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","source_modified_at":"2026-10-21T12:57:18.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"894573e2fdaeb1b15030b7eebc22615edf28a6cd","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","source_modified_at":"2026-10-21T12:57:18.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7a46f1917b320cc8762183b802301da02a191b6a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","source_modified_at":"2026-10-21T12:57:18.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3a23fb158ba517b77a2e5258263bdfdaa480f758","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","source_modified_at":"2026-10-21T12:57:18.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"1d62f0f2bc7edb12ed09f71203df0e47fa4efca4","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.0575,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:49:32.909Z","modified_at":"2026-10-21T12:57:18.542Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:57:18.542Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98831","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/702b5db6e7b3865be70675d57d6fd7dde80d02b6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4"}],"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":"2026-10-21T12:57:18.542Z","content_hash":"13e66bed6a2c7507ec8630db9998106c90974faa2520e04d3028585452ecec7e"}}