CVE-2026-98867
Unknown
Description
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedOct 18, 2026
First seenOct 18, 2026
How to fix
Update
- Linux Linux3d5a87cb909c1f375f08065b20123fa5db5958d8, 10449703200076980704894c3d68d6796182371b, 97fc4b53dbe4a983fdf093243067fa6a64562307 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 3d5a87cb909c1f375f08065b20123fa5db5958d8, 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 10449703200076980704894c3d68d6796182371b, 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 97fc4b53dbe4a983fdf093243067fa6a64562307, 6.18 | 3d5a87cb909c1f375f08065b20123fa5db5958d8, 10449703200076980704894c3d68d6796182371b, 97fc4b53dbe4a983fdf093243067fa6a64562307 |
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