CVE-2025-39815

MEDIUM EPSS 3.3%
Published Sep 16, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: RISC-V: KVM: fix stack overrun when loading vlenb The userspace load can put up to 2048 bits into an xlen bit stack buffer. We want only xlen bits, so check the size beforehand.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥6.8  –  <6.12.45
linuxlinux_kernel*≥6.13  –  <6.16.5
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any

References 3

  • git.kernel.org https://git.kernel.org/stable/c/6d28659b692a0212f360f8bd8a58712b339f9aac
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/799766208f09f95677a9ab111b93872d414fbad7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c76bf8359188a11f8fd790e5bbd6077894a245cc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/6d28659b692a0212f360f8bd8a58712b339f9aac
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/799766208f09f95677a9ab111b93872d414fbad7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c76bf8359188a11f8fd790e5bbd6077894a245cc
    Patch