CVE-2026-98868
Unknown
Description
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: reject a kset that overruns its segment cache_replay(), the writeback worker and the GC worker read a kset of get_kset_onmedia_size() bytes and advance the position by it. A forged key_num makes that size exceed the segment's remaining space, so the advance walks past the segment and trips the cache_pos_advance() BUG_ON. Reject a kset whose on-media size exceeds cache_seg_remain() before use.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedOct 18, 2026
First seenOct 18, 2026
How to fix
Update
- Linux Linux01a700e9278da5706c865b9ca3ae70fdb7b4531d, 96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10, 7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 01a700e9278da5706c865b9ca3ae70fdb7b4531d, 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10, 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb, 6.18 | 01a700e9278da5706c865b9ca3ae70fdb7b4531d, 96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10, 7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb |
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