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CVE-2022-50567
fs: jfs: fix shift-out-of-bounds in dbAllocAG
Description

In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbAllocAG Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds. Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.

INFO

Published Date :

Oct. 22, 2025, 2:15 p.m.

Last Modified :

Oct. 22, 2025, 2:15 p.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2022-50567 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
Solution
Fix shift-out-of-bounds by checking bmp->db_agl2size in dbMount.
  • Add check for bmp->db_agl2size in dbMount.
  • Reorganize error handling code in dbMount.
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-2022-50567.

URL Resource
https://git.kernel.org/stable/c/0536f76a2bca83d1a3740517ba22cc93a44b3099
https://git.kernel.org/stable/c/2c575c8905f7a8b32d5611b91856b69bac2a5bf1
https://git.kernel.org/stable/c/3115313cf03113e87c87adee18ee49a20bbdb9ba
https://git.kernel.org/stable/c/359616ce587e524107730504891afa4b1a8be58c
https://git.kernel.org/stable/c/3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd
https://git.kernel.org/stable/c/67973caae78e21ee46a7281aaa8ca364eb9c444f
https://git.kernel.org/stable/c/898f706695682b9954f280d95e49fa86ffa55d08
https://git.kernel.org/stable/c/d3b486946a4e62c7ef6023f7d9c1d049051384ba
https://git.kernel.org/stable/c/eea87acb6027be3dd4d3c57186bb22800d57fdda
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2022-50567 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-2022-50567 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-2022-50567 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-2022-50567 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.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Oct. 22, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbAllocAG Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds. Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.
    Added Reference https://git.kernel.org/stable/c/0536f76a2bca83d1a3740517ba22cc93a44b3099
    Added Reference https://git.kernel.org/stable/c/2c575c8905f7a8b32d5611b91856b69bac2a5bf1
    Added Reference https://git.kernel.org/stable/c/3115313cf03113e87c87adee18ee49a20bbdb9ba
    Added Reference https://git.kernel.org/stable/c/359616ce587e524107730504891afa4b1a8be58c
    Added Reference https://git.kernel.org/stable/c/3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd
    Added Reference https://git.kernel.org/stable/c/67973caae78e21ee46a7281aaa8ca364eb9c444f
    Added Reference https://git.kernel.org/stable/c/898f706695682b9954f280d95e49fa86ffa55d08
    Added Reference https://git.kernel.org/stable/c/d3b486946a4e62c7ef6023f7d9c1d049051384ba
    Added Reference https://git.kernel.org/stable/c/eea87acb6027be3dd4d3c57186bb22800d57fdda
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
No CVSS metrics available for this vulnerability.