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5.5
MEDIUM CVSS 3.1
CVE-2022-49366
KDE Samba Daemon (ksmbd) Reference Count Leak
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".

INFO

Published Date :

Feb. 26, 2025, 7:01 a.m.

Last Modified :

April 14, 2025, 8:42 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2022-49366 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Address Linux kernel reference count leak in ksmbd by applying the provided fix.
  • Apply the patch to fix the reference count leak.
  • Update the Linux kernel to the latest version.
  • Recompile the kernel with the fix applied.
  • Test the system after applying the patch.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2022-49366.

URL Resource
https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900 Patch
https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883 Patch
https://git.kernel.org/stable/c/cf824b95c12a1abacadbc2d069931963221a3414 Patch
https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2022-49366 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2022-49366 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2022-49366 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2022-49366 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Apr. 14, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Added CWE NVD-CWE-Other
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.18 up to (excluding) 5.18.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.17.15 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 5.15.47
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/cf824b95c12a1abacadbc2d069931963221a3414 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724 Types: Patch
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 26, 2025

    Action Type Old Value New Value
    Added 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".
    Added Reference https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900
    Added Reference https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883
    Added Reference https://git.kernel.org/stable/c/cf824b95c12a1abacadbc2d069931963221a3414
    Added Reference https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact