CVE-2025-40266

CVE-2025-40266

High · published December 4, 2025

CVSS v3.1
8.2
EPSS
0%
Percentile
3.8
In the wild
Unconfirmed
What it is

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

KVM: arm64: Check the untrusted offset in FF-A memory share

Verify the offset to prevent OOB access in the hypervisor

FF-A buffer in case an untrusted large enough value

[U32_MAX - sizeof(struct ffa_composite_mem_region) + 1, U32_MAX]

is set from the host kernel.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00150 · 3.8th percentile
Published
2025-12-04T21:16Z
References (4)
https://git.kernel.org/stable/c/103e17aac09cdd358133f9e00998b75d6c1f1518 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc1909ef38788f2ee3d8011d70bf029948433051 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9f1aed6c8a3427900da3121e1868124854569c3 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc3139d9f4c1fe1c7d5f25f99676bd8e9c6a1041 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 04 DEC 16:08Z
    KVM: arm64: Check the untrusted offset in FF-A memory share
    cvelistv5