PT-2025-49387 · Linux+3 · Linux Kernel+3

Published 2025-12-06 · Updated 2026-05-07 · CVE-2025-40286

Positive Technologies (AI Summary)

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

Description A memory leak exists in the Linux kernel's SMB server, specifically within the smb2 read() function when ksmbd vfs read() fails. This occurs due to a missing kvfree() call, leading to potential memory exhaustion.

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

Exploit

Related Identifiers

CVE-2025-40286

ECHO-8044-0552-B3A6

MGASA-2026-0017

MGASA-2026-0018

USN-8029-1

USN-8029-2

USN-8029-3

USN-8030-1

USN-8048-1

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

Linux Kernel

Linuxmint

Ubuntu

References · 1583

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40286.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-2025-68319 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38543 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40098 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38702 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8030-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40359 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40284 · Vendor Advisory