What’s Vulnerable › Vulnerabilities

CVE-2026-43174: io_uring/zcrx: fix post open error handling

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix post open error handling Closing a queue doesn't guarantee that all associated page pools are terminated right away, let the refcounting do the work instead of releasing the zcrx ctx directly.

Affected products

• Linux kernel: from 6.15 before 6.19.6 — fixed in 6.19.6

How to fix

Upgrade to a fixed version: Linux kernel 6.19.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/18afaff077b46655a8eb6fd7f6de1b81327be577
• https://git.kernel.org/stable/c/5d540e4508950c674d6feef1d95463d039bbf4f5

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