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Vulnerability record · CVE-2026-45995 · published 27 May 2026

CVE-2026-45995: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.9% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20 Patch
https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d Patch

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Source: NIST National Vulnerability Database (record CVE-2026-45995), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.