CVE-2026-93201 Linux Kernel dm-pcache - Out-of-Bounds Read & Write

Linux kernel dm-pcache contains an out-of-bounds read and write vulnerability caused by lack of validation of seg_id fields from persistent memory in cache device metadata, letting attackers with CAP_SYS_ADMIN privileges cause memory corruption, exploit requires CAP_SYS_ADMIN privilege.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the patch that validates seg_id fields and bounds checks cache segments.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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