PT-2025-40639 · Linux+3 · Linux Kernel+3

Published

2025-09-14

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Updated

2026-05-07

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CVE-2025-39943

CVSS v3.1

7.1

High

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)
Description The Linux kernel’s ksmbd component contains a flaw related to the handling of smb direct data transfer structures. Specifically, the data offset and data length fields are not properly validated, potentially leading to out-of-bounds access. This issue is present in the recv done function.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-02682
CVE-2025-39943
DLA-4379-1
DSA-6053-1
ECHO-7563-8A59-8970
MGASA-2025-0309
MGASA-2025-0310
USN-8033-1
USN-8033-2
USN-8033-3
USN-8033-4
USN-8033-5
USN-8033-6
USN-8033-7
USN-8033-8
USN-8034-1
USN-8034-2
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-8141-1
USN-8163-1
USN-8163-2
USN-8165-1
USN-8243-1
USN-8261-1

Affected Products

Debian
Linuxmint
Linux Kernel
Ubuntu