CVE-2026-74605
- Source
- https://cve.org/CVERecord?id=CVE-2026-74605
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74605.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-74605
- Downstream
AZL (1)
BELL (1)
DEBIAN (1)
OESA (2)
UBUNTU (1)
- Published
- 2026-08-22T15:31:53Z
- Modified
- 2026-10-08T02:51:54Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- eventfs: Use children field for rcu head and add memory barriers
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74605.json" }- References
-
- https://git.kernel.org/stable/c/004f7232e49730448f91665e76bdd7dff8e0c638
- https://git.kernel.org/stable/c/f0ece16ffca7384787b692431961ce202907acf5
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74605.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74605
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced704f960dbee2f1634f4b4e16f208cb16eaf41c1eFixed004f7232e49730448f91665e76bdd7dff8e0c638Fixedf0ece16ffca7384787b692431961ce202907acf5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.6.18Fixed6.7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.7.6Fixed6.8
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf3f41f444b321ec393edbc251e024fd62658ce55
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced305c4e4d80aca2c2d9cf2ebdea56e2eca6d3a6aa