CVE-2026-74605

High

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.

Package Linux Kernel
Published 2026-08-22
Last modified 2026-08-25
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.6.18, 6.7.6, 6.8 and later are affected. Fixed in 7.1.9, 7.2 and their respective stable series.

Affected from
≥ 6.6.18 ≥ 6.7.6 ≥ 6.8
Fixed in
✓ 7.1.9 7.1.x ✓ 7.2

References

2 total

Frequently asked questions

  • What is CVE-2026-74605?

    CVE-2026-74605 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.6.18 onward and has been patched in 7.1.9 and 7.2. CVE-2026-74605 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2026-74605?

    CVE-2026-74605 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2026-74605?

    Yes. CVE-2026-74605 has been patched. Fixed versions include 7.1.9 and 7.2. If you are running Linux kernel 6.6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-74605 actively exploited?

    No. CVE-2026-74605 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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