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CVE-2026-68400

Last refreshed2026-10-23

Status: UPDATED  |  Advisory ID: CVE-2026-68400

Key Details

CVECVE-2026-68400
CVSS Score / Version
7.8 (High) / CVSS v3.1
Updated2026-10-21
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Linux Kernel

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation

Use the descriptor's `ep_mem_offset` to calculate the start of the endpoint

memory access array and to comply with the FF-A spec instead of defaulting

to `sizeof(struct ffa_mem_region)`.

This requires moving `ffa_mem_region_additional_setup()` earlier in the setup

flow.

Also, add sanity checks to ensure the calculated descriptor offsets do not

exceed `max_fragsize`. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-68400
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-68400

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