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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-90323

ublk: validate auto buf reg before taking uring_cmd

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 52460dda3a775a73f226312b43c0a0211e8665ea to < 8397942b67128e0b1275cfedb5abf4faafac5fd0affected
  • 52460dda3a775a73f226312b43c0a0211e8665ea to < 653d22269a8b83b491f7f186a5d7872f14e6ddcaaffected
  • 52460dda3a775a73f226312b43c0a0211e8665ea to < ca5a01eee34c7cbe0f531a613b0292a3ad1a419baffected

Linux Linux

Default version status: affected

  • 6.17affected
  • 0 to < 6.17unaffected
  • 6.18.57 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References