Answer in brief
CVE-2026-98831 records a Unknown severity vulnerability in of/overlay: don't leak fragment references when changeset init fails. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <894573e2fdaeb1b15030b7eebc22615edf28a6cd || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <7a46f1917b320cc8762183b802301da02a191b6a || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <3a23fb158ba517b77a2e5258263bdfdaa480f758 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <1d62f0f2bc7edb12ed09f71203df0e47fa4efca4 | 894573e2fdaeb1b15030b7eebc22615edf28a6cd, 7a46f1917b320cc8762183b802301da02a191b6a, 3a23fb158ba517b77a2e5258263bdfdaa480f758, 1d62f0f2bc7edb12ed09f71203df0e47fa4efca4 |
| Linux/Linuxgeneric | 4.15 | Not reported |
| Linux/Linuxgeneric | >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <702b5db6e7b3865be70675d57d6fd7dde80d02b6 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <894573e2fdaeb1b15030b7eebc22615edf28a6cd || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <7a46f1917b320cc8762183b802301da02a191b6a || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <3a23fb158ba517b77a2e5258263bdfdaa480f758 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <1d62f0f2bc7edb12ed09f71203df0e47fa4efca4 | 702b5db6e7b3865be70675d57d6fd7dde80d02b6, 894573e2fdaeb1b15030b7eebc22615edf28a6cd, 7a46f1917b320cc8762183b802301da02a191b6a, 3a23fb158ba517b77a2e5258263bdfdaa480f758, 1d62f0f2bc7edb12ed09f71203df0e47fa4efca4 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: of/overlay: don't leak fragment references when changeset init fails init_overlay_changeset() stores the number of initialized fragments in ovcs->count only on full success. When find_target() or the __symbols__ lookup fails partway through, the target and overlay references taken for the fragments initialized so far are never dropped: free_overlay_changeset() bounds its cleanup loop by ovcs->count, which is still 0. Store the running count on the error path so free_overlay_changeset() puts whatever was set up. The store is guarded by ovcs->fragments because on the allocation-failure path cnt still holds the counting pass total while there is no fragments array; everywhere else cnt only counts fully-initialized fragments.
Quoted source text, attributed separately from HOL analysis.