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Description

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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-05-27 | Assigner Linux

Product status

Default status
unaffected

87213b0d847cd300285b5545598e0548baeb5208 (git) before ce63eda3e6d36e2c253febee1c8421ecbd1a680e
affected

87213b0d847cd300285b5545598e0548baeb5208 (git) before ed9f54cc1e335096733aed03c2a46de3d58922ed
affected

Default status
affected

6.19
affected

Any version before 6.19
unaffected

6.19.4 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/ce63eda3e6d36e2c253febee1c8421ecbd1a680e

git.kernel.org/...c/ed9f54cc1e335096733aed03c2a46de3d58922ed

cve.org (CVE-2026-45975)

nvd.nist.gov (CVE-2026-45975)

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