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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-47660 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-47660
NVD Published Date:
10/09/2024
NVD Last Modified:
10/23/2024
Source:
kernel.org