CVE-2026-74605
eventfs: Use children field for rcu head and add memory barriers
Description
In the Linux kernel, the following vulnerability has been resolved: eventfs: Use children field for rcu head and add memory barriers When an eventfs inode is freed, it sets ei->is_freed and then uses its ei->list to add it to the srcu link list as the list field is a union with the rcu list head. As the ei->list is used to iterate over an SRCU protected list without taking the eventfs_mutex, there's nothing stopping the iteration over that list to see the ei->rcu instead of the ei->list and it will read a corrupt target. To fix this, change the union of the rcu list head with the children list. On freeing the eventfs inode, set the is_free and execute a smp_wmb() before adding the eventfs inode to the SRCU list. On iteration of the ei->children list, at the start, execute a smp_rmb() and then read the is_freed of the ei to see if the children list is still valid. If is_freed is set, then the ei_child read is not valid and the loop should exit immediately.
INFO
Published Date :
Aug. 22, 2026, 4:16 p.m.
Last Modified :
Aug. 22, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the latest version.
- Ensure RCU and memory barriers are correctly implemented.
- Validate inode freeing and list operations.
- Verify SRCU list iteration safety.
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-2026-74605.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/004f7232e49730448f91665e76bdd7dff8e0c638 | |
| https://git.kernel.org/stable/c/f0ece16ffca7384787b692431961ce202907acf5 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74605 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-2026-74605
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-2026-74605 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74605 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
Aug. 22, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '704f960dbee2f1634f4b4e16f208cb16eaf41c1e', 'lessThan': '004f7232e49730448f91665e76bdd7dff8e0c638', 'versionType': 'git'}, {'status': 'affected', 'version': '704f960dbee2f1634f4b4e16f208cb16eaf41c1e', 'lessThan': 'f0ece16ffca7384787b692431961ce202907acf5', 'versionType': 'git'}, {'status': 'affected', 'version': 'f3f41f444b321ec393edbc251e024fd62658ce55', 'versionType': 'git'}, {'status': 'affected', 'version': '305c4e4d80aca2c2d9cf2ebdea56e2eca6d3a6aa', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.18', 'lessThan': '6.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.7.6', 'lessThan': '6.8', 'versionType': 'semver'}], 'programFiles': ['fs/tracefs/event_inode.c', 'fs/tracefs/internal.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/tracefs/event_inode.c', 'fs/tracefs/internal.h'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: eventfs: Use children field for rcu head and add memory barriers When an eventfs inode is freed, it sets ei->is_freed and then uses its ei->list to add it to the srcu link list as the list field is a union with the rcu list head. As the ei->list is used to iterate over an SRCU protected list without taking the eventfs_mutex, there's nothing stopping the iteration over that list to see the ei->rcu instead of the ei->list and it will read a corrupt target. To fix this, change the union of the rcu list head with the children list. On freeing the eventfs inode, set the is_free and execute a smp_wmb() before adding the eventfs inode to the SRCU list. On iteration of the ei->children list, at the start, execute a smp_rmb() and then read the is_freed of the ei to see if the children list is still valid. If is_freed is set, then the ei_child read is not valid and the loop should exit immediately. Added Reference https://git.kernel.org/stable/c/004f7232e49730448f91665e76bdd7dff8e0c638 Added Reference https://git.kernel.org/stable/c/f0ece16ffca7384787b692431961ce202907acf5