UNKNOWN NVD
CVE-2026-90323
In the Linux kernel, the following vulnerability has been resolved: ublk: validate auto buf reg before taking uring_cmd With UBLK_F_AUTO_BUF_REG, invalid sqe-
In the Linux kernel, the following vulnerability has been resolved:
ublk: validate auto buf reg before taking uring_cmd
With UBLK_F_AUTO_BUF_REG, invalid sqe->addr can fail after
ublk_fill_io_cmd() has set UBLK_IO_FLAG_ACTIVE. The uring_cmd is
completed while the tag stays active, which can hang teardown.
Split validation from buffer apply so the check has no side effects,
then take the uring_cmd and store the already-validated buffer. Apply
the same order in FETCH so io->buf is not written before __ublk_fetch()
state checks.
References
- https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca
- https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b
This unknown severity vulnerability was published on 2026-09-17 via NVD.
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