Live › vulnerability › CVE-2026-98867
Go to dashboardThe Linux kernel's dm-pcache device-mapper cache reads a key's logical offset from persistent memory and uses it to index an array without a bounds check. A crafted or corrupted cache device can make the kernel write through an out-of-range pointer during replay.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Systems running a Linux kernel with the dm-pcache device-mapper target built or loaded and a persistent memory cache device. The sources do not say which kernel versions are affected or whether the default configuration enables dm-pcache.
No product ranges from the sources yet.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
In the Linux kernel, the following vulnerability has been resolved:
dm-pcache: bound the logical key offset from persistent memory
cache_key_decode() takes a key's logical off from the cache device and later indexes req_key_tree->subtrees[] by it in get_subtree(). An off past the device forms a subtree pointer outside the array, which rb_insert() writes through during replay.
Reject a key of zero length, or whose off+len (computed in 64 bits) exceeds the device size, before it is used.
This page as .md · .json · in your agent: get_signal("CVE-2026-98867")
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.