Riskcovery

CVE-2026-90323

ublk: validate auto buf reg before taking uring_cmd

State
Published
Severity
Not scored
Published
Sep 17, 2026
Updated
Oct 19, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 52460dda3a775a73f226312b43c0a0211e8665ea to before 8397942b67128e0b1275cfedb5abf4faafac5fd0Affected
  • 52460dda3a775a73f226312b43c0a0211e8665ea to before 653d22269a8b83b491f7f186a5d7872f14e6ddcaAffected
  • 52460dda3a775a73f226312b43c0a0211e8665ea to before ca5a01eee34c7cbe0f531a613b0292a3ad1a419bAffected
LinuxLinux
  • 6.17Affected
  • before 6.17Not affected
  • 6.18.57 through 6.18.*Not affected
  • 7.2.6 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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