CVE-2025-71151

cifs: Fix memory and information leak in smb3_reconfigure()

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory and information leak in smb3_reconfigure() In smb3_reconfigure(), if smb3_sync_session_ctx_passwords() fails, the
function returns immediately without freeing and erasing the newly
allocated new_password and new_password2. This causes both a memory leak
and a potential information leak. Fix this by calling kfree_sensitive() on both password buffers before
returning in this error case.

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory and information leak in smb3_reconfigure() In smb3_reconfigure(), if smb3_sync_session_ctx_passwords() fails, the function returns immediately without freeing and erasing the newly allocated new_password and new_password2. This causes both a memory leak and a potential information leak. Fix this by calling kfree_sensitive() on both password buffers before returning in this error case.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2026-01-13 CVE Reserved
2026-01-23 CVE Published
2026-01-26 CVE Updated
2026-01-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (8)

URL	Tag	Source
https://git.kernel.org/stable/c/880a661e67648a3ffe85405e8de5f50650a3c0b2	Vuln. Introduced
https://git.kernel.org/stable/c/0e4145774c016530bf99afb3675a1a0593c35642	Vuln. Introduced
https://git.kernel.org/stable/c/0f0e357902957fba28ed31bde0d6921c6bd1485d	Vuln. Introduced
https://git.kernel.org/stable/c/674ba43944dab8e8f87434e25d9d10c5152584bc	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/bc390b2737205163e48cc1655f6a0c8cd55b02fc	2026-01-11
https://git.kernel.org/stable/c/5679cc90bb5415801fa29041da0319d9e15d295d	2026-01-08
https://git.kernel.org/stable/c/bb82aaee16907dc4d0b9b0ca7953ceb3edc328c6	2026-01-02
https://git.kernel.org/stable/c/cb6d5aa9c0f10074f1ad056c3e2278ad2cc7ec8d	2025-12-24

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.6.64 < 6.6.120 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6.64 < 6.6.120"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.12.2 < 6.12.64 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.12.2 < 6.12.64"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.13 < 6.18.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.13 < 6.18.3"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.13 < 6.19-rc3 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.13 < 6.19-rc3"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				6.11.11 Search vendor "Linux" for product "Linux Kernel" and version "6.11.11"		en		Affected