CVE-2026-45962

ublk: Validate SQE128 flag before accessing the cmd

published May 27, 2026

CVSS
—
EPSS
0%
Percentile
5.1
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

ublk: Validate SQE128 flag before accessing the cmd

ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before

IO_URING_F_SQE128 flag check. This could cause out of boundary memory

access.

Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return

-EINVAL immediately if the flag is not set.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00162 · 5.1th percentile
Published
2026-05-27T12:18Z
EPSS history
Timeline
  • 27 MAY 12:18Z
    ublk: Validate SQE128 flag before accessing the cmd
    cvelistv5