0.0
NA
CVE-2024-47660
"Linux filesystem Denial of Service (DoS) Vulnerability"
Description

In the Linux kernel, the following vulnerability has been resolved: fsnotify: clear PARENT_WATCHED flags lazily In some setups directories can have many (usually negative) dentries. Hence __fsnotify_update_child_dentry_flags() function can take a significant amount of time. Since the bulk of this function happens under inode->i_lock this causes a significant contention on the lock when we remove the watch from the directory as the __fsnotify_update_child_dentry_flags() call from fsnotify_recalc_mask() races with __fsnotify_update_child_dentry_flags() calls from __fsnotify_parent() happening on children. This can lead upto softlockup reports reported by users. Fix the problem by calling fsnotify_update_children_dentry_flags() to set PARENT_WATCHED flags only when parent starts watching children. When parent stops watching children, clear false positive PARENT_WATCHED flags lazily in __fsnotify_parent() for each accessed child.

INFO

Published Date :

Oct. 9, 2024, 2:15 p.m.

Last Modified :

Oct. 10, 2024, 12:51 p.m.

Source :

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

Remotely Exploitable :

No

Impact Score :

Exploitability Score :

Affected Products

The following products are affected by CVE-2024-47660 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
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-2024-47660.

URL Resource
https://git.kernel.org/stable/c/172e422ffea20a89bfdc672741c1aad6fbb5044e
https://git.kernel.org/stable/c/3f3ef1d9f66b93913ce2171120d9226b55acd41d
https://git.kernel.org/stable/c/7ef1d2e240c32b1f337a37232d037b07e3919e1a
https://git.kernel.org/stable/c/d8c42405fc3507cc43ba7e4986a773c3fc633f6e
https://git.kernel.org/stable/c/f9a48bc3dd9099935751458a5bbbea4b7c28abc8
https://git.kernel.org/stable/c/fc1b1e135c3f72382f792e6c319fc088d5523ad5

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-2024-47660 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-47660 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. 09, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: fsnotify: clear PARENT_WATCHED flags lazily In some setups directories can have many (usually negative) dentries. Hence __fsnotify_update_child_dentry_flags() function can take a significant amount of time. Since the bulk of this function happens under inode->i_lock this causes a significant contention on the lock when we remove the watch from the directory as the __fsnotify_update_child_dentry_flags() call from fsnotify_recalc_mask() races with __fsnotify_update_child_dentry_flags() calls from __fsnotify_parent() happening on children. This can lead upto softlockup reports reported by users. Fix the problem by calling fsnotify_update_children_dentry_flags() to set PARENT_WATCHED flags only when parent starts watching children. When parent stops watching children, clear false positive PARENT_WATCHED flags lazily in __fsnotify_parent() for each accessed child.
    Added Reference kernel.org https://git.kernel.org/stable/c/3f3ef1d9f66b93913ce2171120d9226b55acd41d [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f9a48bc3dd9099935751458a5bbbea4b7c28abc8 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/d8c42405fc3507cc43ba7e4986a773c3fc633f6e [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/fc1b1e135c3f72382f792e6c319fc088d5523ad5 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/7ef1d2e240c32b1f337a37232d037b07e3919e1a [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/172e422ffea20a89bfdc672741c1aad6fbb5044e [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-2024-47660 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-2024-47660 weaknesses.

NONE - Vulnerability Scoring System
: