Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2022-49366

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
26/02/2025
Last modified:
01/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ksmbd: fix reference count leak in smb_check_perm_dacl()<br /> <br /> The issue happens in a specific path in smb_check_perm_dacl(). When<br /> "id" and "uid" have the same value, the function simply jumps out of<br /> the loop without decrementing the reference count of the object<br /> "posix_acls", which is increased by get_acl() earlier. This may<br /> result in memory leaks.<br /> <br /> Fix it by decreasing the reference count of "posix_acls" before<br /> jumping to label "check_access_bits".

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.15 (including) 5.15.47 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.17.15 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.18 (including) 5.18.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools