CVE-2026-98868
Received
Received - Intake
dm-pcache kset size validation bypass in Linux kernel
Vulnerability report for CVE-2026-98868, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-18
Last updated on: 2026-10-18
Assigner: kernel.org
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 |
| Linux | Linux | 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 |
| Linux | Linux | 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 |
| Linux | Linux | 6.18 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
