{"api_version":"1","generated_at":"2026-10-21T16:09:13+00:00","cve":"CVE-2026-98831","urls":{"html":"https://cve.report/CVE-2026-98831","api":"https://cve.report/api/cve/CVE-2026-98831.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98831","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98831"},"summary":{"title":"of/overlay: don't leak fragment references when changeset init fails","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:37","updated_at":"2026-10-21 13:21:48"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a","name":"https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd","name":"https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/702b5db6e7b3865be70675d57d6fd7dde80d02b6","name":"https://git.kernel.org/stable/c/702b5db6e7b3865be70675d57d6fd7dde80d02b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758","name":"https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4","name":"https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98831","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98831","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61b4de4e0b384f4a22c55c3bada604da49cec4e1 702b5db6e7b3865be70675d57d6fd7dde80d02b6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61b4de4e0b384f4a22c55c3bada604da49cec4e1 894573e2fdaeb1b15030b7eebc22615edf28a6cd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61b4de4e0b384f4a22c55c3bada604da49cec4e1 7a46f1917b320cc8762183b802301da02a191b6a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61b4de4e0b384f4a22c55c3bada604da49cec4e1 3a23fb158ba517b77a2e5258263bdfdaa480f758 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61b4de4e0b384f4a22c55c3bada604da49cec4e1 1d62f0f2bc7edb12ed09f71203df0e47fa4efca4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/of/overlay.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"702b5db6e7b3865be70675d57d6fd7dde80d02b6","status":"affected","version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","versionType":"git"},{"lessThan":"894573e2fdaeb1b15030b7eebc22615edf28a6cd","status":"affected","version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","versionType":"git"},{"lessThan":"7a46f1917b320cc8762183b802301da02a191b6a","status":"affected","version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","versionType":"git"},{"lessThan":"3a23fb158ba517b77a2e5258263bdfdaa480f758","status":"affected","version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","versionType":"git"},{"lessThan":"1d62f0f2bc7edb12ed09f71203df0e47fa4efca4","status":"affected","version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/of/overlay.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.15"},{"lessThan":"4.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"4.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-21T12:57:18.542Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/702b5db6e7b3865be70675d57d6fd7dde80d02b6"},{"url":"https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd"},{"url":"https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a"},{"url":"https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758"},{"url":"https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4"}],"title":"of/overlay: don't leak fragment references when changeset init fails","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98831","datePublished":"2026-10-18T15:49:32.909Z","dateReserved":"2026-09-25T10:25:14.372Z","dateUpdated":"2026-10-21T12:57:18.542Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:37","lastModifiedDate":"2026-10-21 13:21:48","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98831","Ordinal":"1","Title":"of/overlay: don't leak fragment references when changeset init f","CVE":"CVE-2026-98831","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98831","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"of/overlay: don't leak fragment references when changeset init f"}]}}}