0.0
NA
CVE-2024-49957
Linux Kernel OCFS2 Null Pointer Dereference Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix null-ptr-deref when journal load failed. During the mounting process, if journal_reset() fails because of too short journal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. Subsequently, ocfs2_journal_shutdown() calls jbd2_journal_flush()->jbd2_cleanup_journal_tail()-> __jbd2_update_log_tail()->jbd2_journal_update_sb_log_tail() ->lock_buffer(journal->j_sb_buffer), resulting in a null-pointer dereference error. To resolve this issue, we should check the JBD2_LOADED flag to ensure the journal was properly loaded. Additionally, use journal instead of osb->journal directly to simplify the code.

INFO

Published Date :

Oct. 21, 2024, 6:15 p.m.

Last Modified :

Oct. 21, 2024, 6:15 p.m.

Source :

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

Remotely Exploitable :

No

Impact Score :

Exploitability Score :

Affected Products

The following products are affected by CVE-2024-49957 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.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
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-2024-49957.

URL Resource
https://git.kernel.org/stable/c/387bf565cc03e2e8c720b8b4798efea4aacb6962
https://git.kernel.org/stable/c/5784d9fcfd43bd853654bb80c87ef293b9e8e80a
https://git.kernel.org/stable/c/82dfdd1e31e774578f76ce6dc90c834f96403a0f
https://git.kernel.org/stable/c/86a89e75e9e4dfa768b97db466ad6bedf2e7ea5b
https://git.kernel.org/stable/c/bf605ae98dab5c15c5b631d4d7f88898cb41b649
https://git.kernel.org/stable/c/f60e94a83db799bde625ac8671a5b4a6354e7120
https://git.kernel.org/stable/c/ff55291fb36779819211b596da703389135f5b05

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-2024-49957 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-49957 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.

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

    Oct. 21, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix null-ptr-deref when journal load failed. During the mounting process, if journal_reset() fails because of too short journal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. Subsequently, ocfs2_journal_shutdown() calls jbd2_journal_flush()->jbd2_cleanup_journal_tail()-> __jbd2_update_log_tail()->jbd2_journal_update_sb_log_tail() ->lock_buffer(journal->j_sb_buffer), resulting in a null-pointer dereference error. To resolve this issue, we should check the JBD2_LOADED flag to ensure the journal was properly loaded. Additionally, use journal instead of osb->journal directly to simplify the code.
    Added Reference kernel.org https://git.kernel.org/stable/c/bf605ae98dab5c15c5b631d4d7f88898cb41b649 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/ff55291fb36779819211b596da703389135f5b05 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/82dfdd1e31e774578f76ce6dc90c834f96403a0f [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/86a89e75e9e4dfa768b97db466ad6bedf2e7ea5b [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f60e94a83db799bde625ac8671a5b4a6354e7120 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/387bf565cc03e2e8c720b8b4798efea4aacb6962 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/5784d9fcfd43bd853654bb80c87ef293b9e8e80a [No types assigned]
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.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-49957 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-2024-49957 weaknesses.

NONE - Vulnerability Scoring System
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