CVE-2026-90323
ublk: validate auto buf reg before taking uring_cmd
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 17, 2026 |
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Affected Versions
Linux / Linux
52460dda3a775a73f226312b43c0a0211e8665ea < 653d22269a8b83b491f7f186a5d7872f14e6ddca 52460dda3a775a73f226312b43c0a0211e8665ea < ca5a01eee34c7cbe0f531a613b0292a3ad1a419b
Linux / Linux
6.17