{"id":"CVE-2026-98831","state":"PUBLISHED","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.","publishedAt":"2026-10-18T15:49:32.909Z","updatedAt":"2026-10-30T12:40:03.420Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"c654f283d7db20648a5bbf979209f78d4fa9be3f","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"64517aeaa3d8b158e4d01321a095be48cb551251","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"bbe3dc64b28a14bd9ecb514bbf5115ac8472ed80","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"702b5db6e7b3865be70675d57d6fd7dde80d02b6","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"894573e2fdaeb1b15030b7eebc22615edf28a6cd","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"7a46f1917b320cc8762183b802301da02a191b6a","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"3a23fb158ba517b77a2e5258263bdfdaa480f758","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"1d62f0f2bc7edb12ed09f71203df0e47fa4efca4","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":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","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/c654f283d7db20648a5bbf979209f78d4fa9be3f","https://git.kernel.org/stable/c/64517aeaa3d8b158e4d01321a095be48cb551251","https://git.kernel.org/stable/c/bbe3dc64b28a14bd9ecb514bbf5115ac8472ed80","https://git.kernel.org/stable/c/702b5db6e7b3865be70675d57d6fd7dde80d02b6","https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd","https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a","https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758","https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98831.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98831","state":"PUBLISHED","datePublished":"2026-10-18T15:49:32.909Z","dateUpdated":"2026-10-30T12:40:03.420Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.372Z"},"containers":{"cna":{"title":"of/overlay: don't leak fragment references when changeset init fails","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"c654f283d7db20648a5bbf979209f78d4fa9be3f","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"64517aeaa3d8b158e4d01321a095be48cb551251","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"bbe3dc64b28a14bd9ecb514bbf5115ac8472ed80","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"702b5db6e7b3865be70675d57d6fd7dde80d02b6","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"894573e2fdaeb1b15030b7eebc22615edf28a6cd","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"7a46f1917b320cc8762183b802301da02a191b6a","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"3a23fb158ba517b77a2e5258263bdfdaa480f758","versionType":"git"},{"version":"61b4de4e0b384f4a22c55c3bada604da49cec4e1","status":"affected","lessThan":"1d62f0f2bc7edb12ed09f71203df0e47fa4efca4","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":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","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/c654f283d7db20648a5bbf979209f78d4fa9be3f"},{"url":"https://git.kernel.org/stable/c/64517aeaa3d8b158e4d01321a095be48cb551251"},{"url":"https://git.kernel.org/stable/c/bbe3dc64b28a14bd9ecb514bbf5115ac8472ed80"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:40:03.420Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"5.10.273"},{"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"}}}}}