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.
Affected versions
Linux kernel versions
6.19
and later are affected. Fixed in
7.0.4,
7.1-rc1
and their respective stable series.
References
The following references provide additional information about CVE-2026-45995 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20
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PatchKernel patch commithttps://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d
Frequently asked questions
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What is CVE-2026-45995?
CVE-2026-45995 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.19 onward and has been patched in 7.0.4 and 7.1-rc1. CVE-2026-45995 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-45995?
Yes — CVE-2026-45995 has been patched. Fixed versions include 7.0.4 and 7.1-rc1. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45995 actively exploited?
No — CVE-2026-45995 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.