CVE-2026-45995 Details
Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix user_struct uaf io_free_rbuf_ring() usees a struct user_struct, which io_zcrx_ifq_free() puts it down before destroying the ring.
A user-after-free vulnerability has been addressed in the Linux kernel's io_uring zcrx component. This issue arises because the function io_free_rbuf_ring() uses a user_struct, which is released by io_zcrx_ifq_free() before the buffer ring is fully destroyed. As a result, this creates a potential use-after-free scenario that could be exploited.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20 | kernel.org | Patch |
| https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.19, < 7.0.4 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 16, 2026 | Initial Analysis | [email protected] |
| May 27, 2026 | New CVE Received | kernel.org |