PT-2025-37968 · Linux+4 · Linux Kernel+4

Published 2025-01-01 · Updated 2026-05-26 · CVE-2025-39823

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description The Linux kernel contains an issue where guest-controlled indices, min and dest id, could potentially lead to speculative execution side-channels. The array index nospec() function is used after bounds checks to clamp these values as a mitigation.

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

Exploit

Buffer Overflow

Improper Validation of Array Index

Weakness Enumeration

CWE-119

CWE-129

Related Identifiers

AZL-67419

AZL-74718

BDU:2025-14970

CVE-2025-39823

DLA-4327-1

DLA-4328-1

DSA-6008-1

DSA-6009-1

ECHO-034E-4ACA-3223

OESA-2026-1275

OESA-2026-1303

OESA-2026-1304

OESA-2026-1305

OPENSUSE-SU-2025:20081-1

SUSE-SU-2025:03600-1

SUSE-SU-2025:03601-1

SUSE-SU-2025:03613-1

SUSE-SU-2025:03615-1

SUSE-SU-2025:03626-1

SUSE-SU-2025:03628-1

SUSE-SU-2025:03633-1

SUSE-SU-2025:03634-1

SUSE-SU-2025:20851-1

SUSE-SU-2025:20861-1

SUSE-SU-2025:20870-1

SUSE-SU-2025:20898-1

SUSE-SU-2025:21074-1

SUSE-SU-2025:21139-1

SUSE-SU-2025:21179-1

SUSE-SU-2025:3716-1

SUSE-SU-2025:3725-1

SUSE-SU-2025:3751-1

SUSE-SU-2025:3761-1

USN-7909-1

USN-7909-2

USN-7909-3

USN-7909-4

USN-7909-5

USN-7910-1

USN-7910-2

USN-7933-1

USN-7938-1

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

Debian

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 3946

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39823.json · Exploit
• https://ubuntu.com/security/CVE-2025-68222 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38396 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38576 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22128 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68724 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68332 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38217 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39795 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-4328-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40049 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68180 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38584 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68201 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39947 · Vendor Advisory