CVE-2022-49366

ksmbd: fix reference count leak in smb_check_perm_dacl()

State: Published
Severity: 5.5 Medium
Published: Feb 26, 2025
Updated: May 11, 2026
Reserved: Feb 26, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix reference count leak in smb_check_perm_dacl()

The issue happens in a specific path in smb_check_perm_dacl(). When "id" and "uid" have the same value, the function simply jumps out of the loop without decrementing the reference count of the object "posix_acls", which is increased by get_acl() earlier. This may result in memory leaks.

Fix it by decreasing the reference count of "posix_acls" before jumping to label "check_access_bits".

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	777cad1604d68ed4379ec899d1f7d2f6a29f01f0 to before cf824b95c12a1abacadbc2d069931963221a3414Affected 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 to before 248d71b440aef829f5cc5f6545ca113ef5062900Affected 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 to before 9758a6653c27867d810de02b4e5697163dda9883Affected 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 to before d21a580dafc69aa04f46e6099616146a536b0724Affected
LinuxLinux	5.15Affected before 5.15Not affected 5.15.47 through 5.15.Not affected 5.17.15 through 5.17.Not affected 5.18.4 through 5.18.*Not affected 5.19 and laterNot affected

References

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