Riskcovery

CVE-2026-98868

dm-pcache: reject a kset that overruns its segment

State
Published
Severity
Not scored
Published
Oct 18, 2026
Updated
Oct 19, 2026
Reserved
Sep 25, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 to before 01a700e9278da5706c865b9ca3ae70fdb7b4531dAffected
  • 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 to before 96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10Affected
  • 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 to before 7ac1f10f987a2ffae4aecf0e2ceca8f552b665cbAffected
LinuxLinux
  • 6.18Affected
  • before 6.18Not affected
  • 6.18.52 through 6.18.*Not affected
  • 7.2.10 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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