PT-2025-37960 · Linux+5 · Linux Kernel+5

Published 2025-08-05 · Updated 2026-05-07 · CVE-2025-39815

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A stack overrun issue was resolved in the Linux kernel related to KVM on RISC-V architectures when loading vlenb. A userspace load could potentially place up to 2048 bits into a stack buffer designed for xlen bits, leading to a stack overrun.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2025-15256

CVE-2025-39815

DSA-6008-1

USN-8095-1

USN-8095-2

USN-8095-3

USN-8095-4

USN-8095-5

USN-8100-1

USN-8125-1

USN-8126-1

USN-8165-1

USN-8261-1

Affected Products

Astra Linux

Kvm

Linuxmint

Linux Kernel

Risc-V

Ubuntu

References · 1411

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39815.json · Exploit
• https://ubuntu.com/security/CVE-2025-40269 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38055 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40092 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21833 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39788 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40030 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38251 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38543 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38702 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40284 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-37927 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38232 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68282 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40324 · Vendor Advisory