What is CVE-2026-45995?

CVE-2026-45995 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-27.

How severe is CVE-2026-45995?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Linux

CVE-2026-45995

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.

Vulnerability class: Use-After-Free

EPSS: 0.001 (2.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 5c686456a4e83ef06c74d40be05c21a0ef136684, 7.1-rc1, 6.19
Linux Linux_kernel

Weakness classification (CWE)

CWE-416 — Use After Free

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-45995?: CVE-2026-45995 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-27.
How severe is CVE-2026-45995?: High severity. CVSS v3 base score is 7.8 out of 10.