CVE-2026-45975
In the Linux kernel, the following vulnerability has been resolved: ublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd struct ublksrv_ctrl_cmd is part of the io_uring_sqe, which may lie in userspace-mapped memory. It's racy to access its fields with normal loads, as userspace may write to them concurrently. Use READ_ONCE() to copy the ublksrv_ctrl_cmd from the io_uring_sqe to the stack. Use the local copy in place of the one in the io_uring_sqe.
Affected versions
Linux kernel versions
6.19
and later are affected. Fixed in
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45975 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/ce63eda3e6d36e2c253febee1c8421ecbd1a680e
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PatchKernel patch commithttps://git.kernel.org/stable/c/ed9f54cc1e335096733aed03c2a46de3d58922ed
Frequently asked questions
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What is CVE-2026-45975?
CVE-2026-45975 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.19 onward and has been patched in 6.19.4 and 7.0. CVE-2026-45975 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-2026-45975?
Yes — CVE-2026-45975 has been patched. Fixed versions include 6.19.4 and 7.0. 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-2026-45975 actively exploited?
No — CVE-2026-45975 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.